Free Online Tools
696+ free utilities for text analysis, math, conversions, development, design, SEO, and everyday calculations.
696 tools
63 categories
100% free
Accessibility 2
Auto 6
Car Depreciation Calculator
Estimate how much your car depreciates over time. See value after 1-10 years.
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Car Lease Calculator
Calculate monthly car lease payments. Enter MSRP, residual value, money factor, and term.
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Electric vs Gas Car Cost
Compare the running costs of an electric vehicle versus a gas car.
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Fuel Economy Converter
Convert between MPG, L/100km, and km/L. Compare fuel efficiency across measurement systems.
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Gas Cost Calculator
Calculate fuel cost for a road trip based on distance, fuel efficiency, and gas price.
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Tire Size Calculator
Decode tire size markings. Enter a tire code like 225/45R17 to see all dimensions.
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Automotive 6
Car Loan Calculator
Calculate monthly car payments, total interest, and compare loan terms for your auto purchase.
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EV Range Calculator
Calculate electric vehicle range based on battery size, efficiency, and driving conditions.
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Fuel Economy Converter
Convert between MPG, L/100km, and km/L. Compare fuel economy across different measurement systems.
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Fuel Efficiency Calculator
Calculate MPG, L/100km, and fuel costs for your trips. Compare different vehicles.
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Tire Size Calculator
Decode tire size notation and compare tire dimensions. Enter sizes like 225/45R17 to see actual meas...
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Tire Size Calculator
Decode tire size markings. Enter a tire size like 225/45R17 to see dimensions and specs.
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Business 7
Business Card Generator
Design a simple business card layout. Enter your details and see a live preview ready for print.
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Business Name Generator
Generate creative business name ideas. Enter keywords related to your business to get suggestions.
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Email Signature Generator
Create a professional HTML email signature. Add your name, title, company, phone, and social links.
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Email Signature Generator
Create a professional HTML email signature. Enter your details and get a styled signature ready to u...
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Meeting Cost Calculator
Calculate how much a meeting actually costs based on attendees, their salaries, and meeting duration...
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Profit Margin Calculator
Calculate profit margin, markup, and gross profit. Enter cost and revenue to see all metrics.
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Simple Invoice
Create a simple invoice with line items and totals. Print or save for your records.
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Calculator 15
Average Calculator
Calculate mean, median, mode, and range from a set of numbers. Enter comma-separated values for inst...
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Combination Calculator
Calculate nCr — the number of combinations of r items from n items. Order does not matter. Shows for...
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Distance Between Points Calculator
Calculate the Euclidean distance between two points in 2D or 3D space. Shows formula and step-by-ste...
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Factorial Calculator
Calculate n! (n factorial) for any number. Supports large numbers using BigInt. Shows the full expan...
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Fraction Calculator
Add, subtract, multiply, and divide fractions. Shows simplified results with step-by-step work. Free...
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GCD Calculator
Calculate the Greatest Common Divisor (GCD) of two or more numbers using the Euclidean algorithm wit...
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LCM Calculator
Calculate the Least Common Multiple of two or more numbers. Shows the formula LCM(a,b) = |a×b| / GCD...
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Modulo Calculator
Calculate A mod B (modulo/remainder) with step-by-step explanation showing the division, quotient, a...
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Number Base Converter
Convert numbers between any bases from 2 (binary) to 36. Supports binary, octal, decimal, and hexade...
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Percentage Calculator
Calculate percentages three ways: X% of Y, X is what % of Y, and percentage change between two value...
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Permutation Calculator
Calculate nPr — the number of permutations of r items from a set of n items. Shows formula and step-...
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Prime Number Checker
Check if any number is prime. Shows factors if composite. Instant primality testing for numbers up t...
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Pythagorean Theorem Calculator
Calculate the missing side of a right triangle using the Pythagorean theorem (a² + b² = c²). Solve f...
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Quadratic Equation Solver
Solve quadratic equations (ax² + bx + c = 0). Shows discriminant, real/complex roots, vertex, and ax...
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Roman Numeral Converter
Convert between Roman numerals and Arabic (decimal) numbers. Supports numbers from 1 to 3999.
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Construction 7
Concrete Calculator
Calculate how much concrete you need in cubic yards and bags. Enter slab dimensions.
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Concrete Calculator
Calculate how much concrete you need in cubic yards and bags for your project.
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Gravel Calculator
Calculate how much gravel you need by area and depth. Results in tons and cubic yards.
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Gravel Calculator
Calculate gravel needed for driveways, paths, and landscaping. Results in tons and cubic yards.
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Roof Pitch Calculator
Calculate roof pitch from rise and run. See the angle, slope factor, and roof area.
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Stair Calculator
Calculate stair dimensions. Enter total rise to get number of steps, riser height, and tread depth.
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Staircase Calculator
Calculate staircase dimensions: number of steps, rise height, and run depth from total height.
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Conversion 10
Angle Converter
Convert between degrees, radians, gradians, and turns. Essential for math and engineering.
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CM to Inches Converter
Convert between centimeters and inches. Also shows feet and inches format.
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Energy Converter
Convert between joules, calories, BTU, kWh, and other energy units.
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Force Converter
Convert between Newtons, pounds-force, kilogram-force, dynes, and kilo-Newtons.
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KG to LBS Converter
Convert between kilograms and pounds instantly. Quick weight conversion tool.
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KM to Miles Converter
Convert between kilometers and miles instantly. See both directions with a single input.
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Liquid Volume Converter
Convert between gallons, liters, quarts, pints, cups, and fluid ounces.
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Pressure Converter
Convert between PSI, bar, atm, kPa, mmHg, and other pressure units instantly.
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Speed Converter
Convert between mph, km/h, m/s, knots, and mach. Instant conversion for all speed units.
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Universal Unit Converter
Convert between hundreds of units across length, weight, volume, temperature, and more.
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Converter 5
Data Storage Converter
Convert between bytes, KB, MB, GB, TB, PB in both binary (1024) and decimal (1000) bases. Free digit...
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Length Converter
Convert between meters, feet, inches, miles, kilometers, yards, centimeters, and more. Free online l...
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Speed Converter
Convert between mph, km/h, m/s, ft/s, and knots. Free online speed and velocity conversion tool.
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Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin with conversion formulas shown. Free temperature con...
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Weight Converter
Convert between kilograms, pounds, ounces, grams, stones, metric tons, and US tons. Free weight conv...
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Converters 6
Cooking Unit Converter
Convert between cooking measurements: cups, tablespoons, teaspoons, ounces, milliliters, and liters.
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Energy Converter
Convert between energy units: joules, calories, kWh, BTU, eV, and more.
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Frequency Converter
Convert between frequency units: Hz, kHz, MHz, GHz, THz, RPM, and radians per second.
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Fuel Economy Converter
Convert between MPG, L/100km, km/L, and miles per imperial gallon.
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Pressure Converter
Convert between pressure units: atm, bar, PSI, pascal, mmHg, kPa, and more.
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Shoe Size Converter
Convert between US, EU, UK, and Japanese shoe sizes for men and women.
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Cooking 8
Cooking Measurement Converter
Convert between cups, tablespoons, teaspoons, ml, liters, and other cooking measurements.
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Cooking Timer
Set multiple named cooking timers. Track different dishes with independent countdown timers.
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Cooking Unit Converter
Convert between cups, tablespoons, teaspoons, milliliters, and more kitchen measurements.
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Multi-Timer Kitchen Timer
Set multiple kitchen timers at once. Perfect for cooking multiple dishes simultaneously.
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Oven Temperature Converter
Convert oven temperatures between Fahrenheit, Celsius, and Gas Mark.
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Oven Temperature Converter
Convert oven temperatures between Fahrenheit, Celsius, and Gas Mark.
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Recipe Scaler
Scale recipe ingredients up or down. Enter the original servings and desired servings to adjust quan...
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Recipe Scaler
Scale recipe ingredients up or down. Enter your recipe and desired serving multiplier.
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Date & Time 13
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your date of birth. Free on...
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Business Days Calculator
Calculate the number of business days between two dates, excluding weekends. Add business days to a ...
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Countdown Timer
Set a countdown timer with hours, minutes, and seconds. Audio alert when time is up. Start, pause, a...
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Date Difference Calculator
Calculate the number of days, weeks, months, and years between two dates. Free online date differenc...
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How Many Days Old Am I?
Find out exactly how many days, hours, minutes, and seconds you have been alive. Enter your birthday...
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Leap Year Checker
Check if any year is a leap year. Shows the rules and next leap year. Free online leap year tool.
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Military Time Converter
Convert between 12-hour (AM/PM) and 24-hour (military) time format. Instant two-way conversion.
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Online Stopwatch
Free online stopwatch with millisecond precision. Start, stop, lap, and reset. Track multiple lap ti...
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Timezone Converter
Convert times between different timezones. See the current time in major cities around the world.
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Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. See the current Unix timestamp live.
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Week Number Calculator
Find the ISO week number for any date. See which week of the year any date falls in.
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What Day Were You Born?
Find out what day of the week you were born on. Enter your birth date and discover your birthday day...
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World Clock
See the current time in cities around the world. Compare time zones side-by-side. Live updating cloc...
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Date/Time 1
Design 39
Advanced Color Picker
Pick, convert, and generate colors and harmonies. Support for HEX, RGB, HSL, and CMYK formats.
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Aspect Ratio Calculator
Calculate aspect ratios for images, videos, and screens. Enter width and height to find the ratio.
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Aspect Ratio Calculator
Calculate and resize dimensions while maintaining aspect ratio. Essential for images and videos.
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Aspect Ratio Calculator
Calculate aspect ratios from width and height. Find equivalent dimensions for different sizes.
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Color Blindness Simulator
Simulate how colors appear to people with different types of color blindness. Test your design for a...
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Color Blindness Simulator
Preview how your chosen color appears to people with different types of color vision deficiency.
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Color Blindness Simulator
Simulate different types of color blindness on any color. See how colors appear to people with CVD.
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Color Contrast Checker
Check the contrast ratio between two colors for WCAG accessibility compliance. Test AA and AAA level...
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Color Mixer
Mix two colors together and see the result. Adjust the blend percentage for custom mixes.
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Color Name Finder
Find the closest named color for any hex code. See the name, category, and similar colors.
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Color Palette Generator
Generate harmonious color palettes from a base color. Choose from complementary, analogous, triadic,...
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Color Palette Generator
Generate beautiful color palettes from a base color. See complementary, analogous, triadic, and spli...
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Color Palette Generator
Generate harmonious color palettes from a base color. Create complementary, analogous, and triadic s...
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Color Palette Generator
Generate beautiful color palettes from a base color. See complementary, analogous, and triadic schem...
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CSS Box Shadow Generator
Create CSS box shadows visually with interactive sliders. Adjust offset, blur, spread, and color. Co...
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CSS Box Shadow Generator
Generate CSS box-shadow with a visual editor. Adjust offset, blur, spread, and color in real-time.
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CSS Box Shadow Generator
Create CSS box shadows visually. Adjust offset, blur, spread, and color to get the perfect shadow.
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CSS Gradient Generator
Create beautiful CSS linear and radial gradients. Pick colors, adjust direction, and copy the CSS co...
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CSS Gradient Generator
Create beautiful CSS gradients visually. Choose colors, direction, and type. Copy the CSS code.
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Font Pairing Generator
Generate beautiful font pairings for your designs. See heading and body font combinations in real-ti...
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Font Size Converter
Convert between px, em, rem, pt, and percentage font sizes. Set base size for accurate conversion.
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Font Size Converter
Convert between px, pt, em, rem, and percentage font sizes.
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Golden Ratio Calculator
Calculate golden ratio proportions. Enter one dimension to find the ideal complementary size.
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Hex to RGB Converter
Convert hex color codes to RGB, HSL, and other color formats. Preview the color in real-time.
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Image Resolution Calculator
Calculate image resolution, DPI, and print size. Enter dimensions to see print quality at different ...
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Paper Size Reference
Quick reference for paper sizes: A series (A0-A6), US Letter, Legal, Tabloid, and more.
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Pixel Ruler
An on-screen pixel ruler for measuring elements. Drag to measure distances in pixels.
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Pixel to CM Converter
Convert between pixels, centimeters, inches, and millimeters at any DPI setting.
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Pixel to Em/Rem Converter
Convert between pixels, ems, rems, and points. Set your base font size for accurate conversions.
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Placeholder Image Generator
Generate placeholder images with custom dimensions, colors, and text. Download as PNG or copy the UR...
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PPI Calculator
Calculate pixels per inch for any display. Enter resolution and screen size.
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Random Color Generator
Generate random colors with one click. See HEX, RGB, and HSL values. Copy any format instantly. Incl...
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Random Color Generator
Generate random colors with hex, RGB, and HSL values. Click to generate and copy color codes.
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RGB to Hex Converter
Convert RGB color values to hexadecimal color codes. Preview colors and copy the hex code.
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Screen Resolution Detector
Detect your screen resolution, pixel ratio, color depth, and viewport size. See what your display su...
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Screen Resolution Info
See your current screen resolution, pixel ratio, and available screen real estate.
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SVG to CSS Background
Convert SVG code to a CSS background-image data URI. Paste your SVG and get an optimized CSS backgro...
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SVG Wave Generator
Generate SVG wave shapes for section dividers. Customize amplitude, frequency, and colors.
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Typography Scale Generator
Generate a harmonious typography scale. Choose a ratio and base size to create a type hierarchy.
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Design Tools 7
Aspect Ratio Calculator
Calculate and simplify aspect ratios. Enter width and height to find the ratio, or enter a ratio and...
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Color Contrast Checker
Check WCAG 2.1 color contrast ratios between foreground and background colors. Test AA and AAA compl...
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Color Palette Generator
Generate harmonious color palettes from a base color. Create complementary, analogous, triadic, and ...
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CSS Border Radius Generator
Generate CSS border-radius with individual corner controls. Live preview of the shape with copyable ...
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CSS Box Shadow Generator
Generate CSS box-shadow with visual controls for offset, blur, spread, and color. Live preview with ...
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CSS Gradient Generator
Create beautiful CSS gradients with a visual editor. Choose colors, direction, and type. Copy CSS co...
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PX to REM Converter
Convert pixels (px) to rem and em units with configurable base font size. Includes a reference table...
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Developer 38
.gitignore Generator
Generate .gitignore files for your project. Select your languages and frameworks to get the right ig...
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Binary to Decimal Converter
Convert binary numbers to decimal, hexadecimal, and octal. Enter a binary number and see all represe...
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chmod Calculator
Calculate Unix file permissions. Toggle read, write, execute for owner, group, and others.
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Crontab Expression Generator
Build cron expressions visually. Select minute, hour, day, month, and weekday with a friendly interf...
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Crontab Generator
Generate cron expressions with a visual builder. See human-readable descriptions of cron schedules.
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CSS Flexbox Generator
Generate CSS flexbox layouts visually. Adjust flex direction, alignment, wrapping, and gap.
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CSS Grid Generator
Generate CSS Grid layouts visually. Set columns, rows, and gap for responsive grid designs.
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CSS Minifier
Minify CSS code by removing whitespace, comments, and unnecessary characters. See byte savings.
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CSV to JSON Converter
Convert CSV data to JSON format. Automatically detects headers and handles quoted fields.
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CSV to Table Viewer
Paste CSV data and view it as a formatted, sortable table. Supports comma, tab, and semicolon delimi...
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Hex to Text Converter
Convert hexadecimal strings to readable text and text to hex. Supports all ASCII characters.
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HTML Entity Encoder
Encode special characters to HTML entities and decode entities back to characters.
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HTML Minifier
Minify HTML by removing extra whitespace, comments, and optional tags. Reduce HTML file size.
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HTML to Markdown
Convert HTML code to Markdown format. Handles headings, links, lists, bold, italic, and more.
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HTML to Text
Strip HTML tags from text. Paste HTML and get clean plain text output.
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JavaScript Minifier
Minify JavaScript code by removing whitespace, comments, and shortening code. See size comparison.
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JSON Escape/Unescape
Escape and unescape JSON strings. Handle special characters, newlines, and quotes safely.
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JSON to CSV Converter
Convert JSON arrays to CSV format. Automatically extracts headers from object keys.
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JWT Decoder
Decode and inspect JSON Web Tokens. See header, payload, and verify token structure.
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License Chooser
Choose the right open source license for your project. Compare MIT, Apache, GPL, BSD, and more.
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Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text. Choose paragraphs, sentences, or words. Copy with one click.
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Lorem Ipsum Generator
Generate placeholder text for designs and mockups. Choose paragraphs, sentences, or words.
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Markdown Preview
Write Markdown and see it rendered as HTML in real-time. Supports headings, bold, italic, lists, cod...
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Markdown to HTML
Convert Markdown to HTML. Supports headings, bold, italic, links, lists, code blocks, and blockquote...
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Placeholder Image URL
Generate placeholder image URLs for development. Choose size, colors, and text.
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Random String Generator
Generate random strings with custom length and character sets. Perfect for tokens, passwords, and te...
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README Generator
Generate a professional README.md for your project. Fill in the details and get formatted markdown.
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Regex Tester
Test regular expressions in real-time. See matches highlighted in your text. Supports flags g, i, m.
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SQL Formatter
Format and beautify SQL queries. Uppercase keywords, proper indentation, and clean alignment.
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SQL Formatter
Format and beautify SQL queries. Uppercase keywords and indent clauses for better readability.
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Text Diff Checker
Compare two blocks of text and highlight the differences. Find what changed between versions.
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Text to Binary
Convert text to binary code (0s and 1s). Each character becomes its 8-bit binary representation.
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Text to Binary Converter
Convert text to binary representation. See the binary encoding of each character.
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Text to Hex Converter
Convert text to hexadecimal representation. See the hex encoding of each character.
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Timestamp Converter
Convert between different date and timestamp formats. Unix, ISO 8601, RFC 2822, and more.
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Unix Epoch Converter
Convert between Unix timestamps and human-readable dates. See the current epoch time in real-time.
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UUID Generator
Generate random UUID v4 identifiers. Click to generate new ones and copy instantly.
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XML Formatter
Format and prettify XML code with proper indentation. Validate XML structure.
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Developer Tools 24
ASCII Table
Complete ASCII character reference table. Browse all 128 characters with decimal, hexadecimal, octal...
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Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 back to text. Supports UTF-8 characters. Free online Base64 t...
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chmod Calculator
Calculate Unix/Linux file permissions interactively. Toggle read, write, and execute for owner, grou...
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Color Code Converter
Convert colors between HEX, RGB, HSL, and CMYK formats with a live color preview swatch. Free online...
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Cron Expression Builder
Build cron expressions visually with an interactive UI. Select minute, hour, day, month, and weekday...
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CSV to JSON Converter
Convert CSV data to JSON format. Auto-detects headers from the first row. Handles quoted fields and ...
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Epoch Time Converter
Convert epoch/Unix timestamps to human-readable dates. Supports seconds, milliseconds, and microseco...
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File Permission Calculator
Calculate Unix/Linux file permissions. Toggle read, write, execute for owner, group, and others. See...
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HTML Entity Encoder/Decoder
Encode and decode HTML entities. Converts < > & " characters to their HTML entity equivalents and ba...
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HTML Entity Reference
Searchable reference of HTML entities including symbols, arrows, math operators, currency signs, and...
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HTTP Status Codes Reference
Complete reference of HTTP status codes with descriptions. Search and filter by code range (1xx–5xx)...
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JSON Formatter & Validator
Pretty-print, validate, and minify JSON data. Detect errors with line numbers. Supports 2-space, 4-s...
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JSON Path Finder
Paste JSON and click on any value to see its full path. Navigate complex JSON structures easily.
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JSON to CSV Converter
Convert JSON arrays to CSV format with auto-detected headers. Download results as .csv file. Free on...
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JSON to YAML Converter
Convert JSON to YAML format and vice versa. Simple paste-and-convert tool for configuration file tra...
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JWT Decoder
Decode JSON Web Tokens (JWT) to see the header, payload, and expiration time. No data sent to any se...
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Markdown Preview
Write Markdown on the left, see rendered HTML on the right in real-time. Supports headings, bold, it...
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Regex Tester
Test regular expressions against text with real-time match highlighting. Shows match groups, indices...
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Text Diff Checker
Compare two texts side-by-side and see additions, deletions, and modifications highlighted. Free onl...
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Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. See the current timestamp live. Supp...
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URL Encoder/Decoder
Encode and decode URL components. Converts special characters to percent-encoding (%20, %3D, etc.) a...
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User Agent Parser
Parse and analyze browser user agent strings. Identify browser, OS, device type, and rendering engin...
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UUID Generator
Generate random v4 UUIDs (Universally Unique Identifiers). Bulk generate up to 100 UUIDs at once. Fr...
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UUID Generator
Generate random UUIDs (v4) instantly. Copy individual UUIDs or generate multiple at once. Standard R...
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Education 6
Flashcard Maker
Create and study digital flashcards. Add cards, flip to reveal answers, and track your progress.
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GPA Calculator
Calculate your Grade Point Average. Add courses with grades and credit hours.
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Grade Calculator
Calculate your weighted grade. Add assignments with scores and weights to find your overall grade.
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Math Quiz Generator
Practice math with randomly generated quizzes. Choose difficulty and operation type.
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Multiplication Table
Generate and study multiplication tables from 1 to 20. Interactive highlighting and quiz mode.
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Periodic Table Lookup
Look up elements from the periodic table. Search by name, symbol, or atomic number.
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Encoding 4
Binary to Text Converter
Convert binary code (01001000 01101001) to readable text and vice versa. Supports ASCII and UTF-8 ch...
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Morse Code Translator
Translate text to Morse code and back. Hear the Morse code played as audio beeps. Free online Morse ...
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ROT13 Encoder/Decoder
Encode and decode text using the ROT13 substitution cipher. Each letter is shifted 13 positions in t...
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Text Encoding Converter
Convert text between multiple encodings: Binary, Octal, Decimal, Hexadecimal, and Base64 — all in on...
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Engineering 18
Capacitor Calculator
Calculate equivalent capacitance for series and parallel capacitor circuits.
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Flow Rate Converter
Convert between gallons/minute, liters/minute, cubic meters/hour, and cubic feet/second.
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LED Resistor Calculator
Calculate the correct resistor value for an LED circuit. Enter supply voltage, LED forward voltage, ...
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LED Resistor Calculator
Calculate the correct resistor value for an LED circuit. Enter supply voltage, LED voltage, and curr...
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Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's law. Enter any two values to find the ...
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Ohm\u2019s Law Calculator
Calculate voltage, current, or resistance using Ohm\u2019s Law (V = IR). Enter any two values.
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Ohm\u2019s Law Calculator
Calculate voltage, current, resistance, and power using Ohm\u2019s Law. Enter any two values.
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Power Converter
Convert between watts, kilowatts, horsepower, BTU/hr, and other power units.
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Resistor Color Code
Decode resistor color bands to find the resistance value. Select colors to see the result.
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Resistor Color Code
Decode resistor color bands to find resistance value. Supports 4 and 5 band resistors.
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Resistor Color Code Calculator
Decode resistor color bands to find resistance values. Supports 4-band and 5-band resistors.
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Torque Converter
Convert between Newton-meters, foot-pounds, inch-pounds, and kilogram-force centimeters.
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Torque Converter
Convert between Newton-meters, foot-pounds, kilogram-force meters, and inch-pounds.
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Voltage Divider Calculator
Calculate output voltage of a voltage divider circuit. Enter input voltage and two resistor values.
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Voltage Divider Calculator
Calculate output voltage from a resistive voltage divider circuit. Enter input voltage and resistor ...
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Wire Gauge Calculator
Look up AWG wire gauge specifications. See diameter, resistance, and max current for each gauge.
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Wire Gauge Calculator
Look up AWG wire specifications. Find diameter, area, resistance, and max current for any gauge.
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Wire Gauge Converter (AWG)
Convert American Wire Gauge (AWG) to diameter, cross-section area, and resistance per meter.
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Environment 1
Fashion 6
Bra Size Calculator
Calculate bra size from band and bust measurements. Get US, UK, and EU sizes.
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Clothing Size Converter
Convert clothing sizes between US, EU, UK, and international sizing for men and women.
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Dress Size Converter
Convert dress sizes between US, UK, EU, and IT sizing systems.
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Ring Size Converter
Convert ring sizes between US, EU, UK, and Japanese systems. Find your ring size from circumference.
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Shoe Size Converter
Convert shoe sizes between US, EU, UK, and Japanese sizing systems for men and women.
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Shoe Size Converter
Convert shoe sizes between US, EU, UK, and CM. Works for men\u2019s and women\u2019s shoes.
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Finance 34
Amortization Calculator
Generate a loan amortization schedule. See principal vs interest breakdown each month.
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Break-Even Calculator
Calculate the break-even point for your business. Find how many units you need to sell to cover cost...
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Compound Interest Calculator
Calculate compound interest on savings and investments. See how your money grows over time with diff...
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Currency Converter
Convert between major world currencies. Uses approximate exchange rates for quick conversion.
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Debt Payoff Calculator
Calculate how long it takes to pay off debt. See total interest paid and create a payoff plan.
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Debt Payoff Calculator
Calculate when you\u2019ll be debt-free. Enter balance, APR, and monthly payment.
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Discount Calculator
Calculate the final price after a percentage discount. Shows amount saved and final price. Supports ...
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Electricity Cost Calculator
Calculate how much it costs to run an electrical device. Enter wattage, hours of use, and electricit...
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Hourly to Salary Converter
Convert your hourly wage to annual salary. See weekly, biweekly, monthly, and annual earnings.
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Hourly to Salary Converter
Convert hourly wage to annual salary. See your projected earnings across all time periods.
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Inflation Calculator
Calculate how inflation affects purchasing power over time. See future value and past value equivale...
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Inflation Calculator
See how inflation affects purchasing power over time. Compare past and future dollar values.
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Interest Rate Converter
Convert between annual (APR), monthly, daily, and effective annual interest rates (APY/EAR). Underst...
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Loan Amortization Calculator
See your complete loan amortization schedule. Track how principal and interest change over each paym...
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Loan Calculator
Calculate monthly loan payments, total interest, and total cost. Works for mortgages, car loans, and...
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Margin Calculator
Calculate profit margin from cost and selling price. See margin percentage, markup, and profit.
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Markup Calculator
Calculate selling price from cost and markup percentage. See profit, margin, and markup.
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Mortgage Amortization Schedule
Generate a full mortgage amortization schedule showing monthly payments, principal, interest, and re...
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Mortgage Calculator
Calculate your monthly mortgage payment, total interest paid, and total cost. Adjustable for loan am...
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Profit & Loss Calculator
Calculate gross profit, operating profit, and net profit margins from revenue and expenses.
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Rent Split Calculator
Split rent fairly between roommates based on room size. Larger rooms pay proportionally more.
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Rent vs Buy Calculator
Compare the cost of renting versus buying a home over time. Factor in appreciation, taxes, and maint...
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Retirement Calculator
Project your retirement savings. See if you are on track based on age, savings, contributions, and e...
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ROI Calculator
Calculate Return on Investment. Enter initial investment and final value to see ROI percentage and a...
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Salary to Hourly Converter
Convert your annual salary to an hourly wage. See equivalent weekly, biweekly, monthly, and daily ra...
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Salary to Hourly Converter
Convert annual salary to hourly rate. Also see biweekly, monthly, and weekly pay breakdowns.
→
Sales Tax Calculator
Calculate sales tax amount and total price. Enter pre-tax price and tax rate.
→
Savings Goal Calculator
Calculate how long to reach your savings goal. See monthly contributions needed and growth over time...
→
Savings Interest Calculator
Calculate how much your savings will grow with compound interest over time.
→
Stock Return Calculator
Calculate your total return on a stock investment including capital gains and dividends.
→
Tip & Split Calculator
Calculate tip amount and split the bill between multiple people. Fast and easy.
→
Tip Calculator
Calculate tip amount and total bill. Split between multiple people. Quick tip percentage buttons. Fr...
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Tip Splitter
Split a restaurant bill with tip among any number of people. See per-person total and tip amount.
→
Tip Splitter
Calculate tip and split the bill among friends. Choose tip percentage and number of people.
→
Fitness 16
Cycling Calorie Calculator
Calculate calories burned while cycling based on distance, speed, and weight.
→
Heart Rate Zone Calculator
Calculate your training heart rate zones based on age and resting heart rate. Karvonen method.
→
One Rep Max Calculator
Calculate your one-rep max (1RM) from any weight and reps. Uses Epley, Brzycki, and Lombardi formula...
→
One Rep Max Calculator
Calculate your one-rep max from the weight and reps you can lift. Uses the Epley and Brzycki formula...
→
One Rep Max Calculator
Calculate your estimated one-rep max from weight and reps performed. Use Epley, Brzycki, and more.
→
Plank Timer
Time your plank holds. See your personal best and track improvement over time.
→
Push-Up Counter
Count your push-ups and track your daily progress. Click to count each rep.
→
Push-up Counter & Timer
Count your push-ups with a timer. Tap or press space for each rep. Track your sets and rest periods.
→
Running Calorie Calculator
Calculate calories burned while running based on distance, pace, and body weight.
→
Running Pace Calculator
Calculate your running pace, speed, and finish time. Enter any two values to find the third.
→
Running Pace Calculator
Calculate your running pace, speed, and finish times. Enter distance and time to find your pace per ...
→
Running Pace Calculator
Calculate running pace, speed, or finish time. Enter any two values to find the third.
→
Step Goal Calculator
Calculate how many steps you need daily to reach a fitness goal. See distance and calories.
→
Target Heart Rate Calculator
Calculate your target heart rate zones for exercise. Based on age and resting heart rate using the K...
→
VO2 Max Calculator
Estimate your VO2 max from a 12-minute Cooper test or 1.5-mile run time. Assess your cardiovascular ...
→
Walking Calorie Calculator
Calculate calories burned while walking. Based on distance, speed, weight, and incline.
→
Fun 38
Baby Name Combiner
Combine two names to create a unique baby name or couple name mashup.
→
Backwards Text Generator
Reverse your text — by characters, words, or sentences. Create mirror text and upside-down text.
→
Binary Clock
See the current time displayed in binary. Each digit of hours, minutes, and seconds shown as bits.
→
Coin Flipper
Flip a virtual coin for heads or tails. Track your flip history and see probability statistics.
→
Dice Roller
Roll virtual dice. Choose number and type of dice (d4, d6, d8, d10, d12, d20). Perfect for tabletop ...
→
Dice Roller
Roll virtual dice. Choose number of dice and sides. Perfect for board games and RPGs.
→
Emoji Picker
Search and copy emojis. Browse by category or search by name. Click to copy any emoji.
→
Emoji to Text
Convert emoji to their text descriptions. Paste emoji to see what they mean.
→
Fancy Text Generator
Transform your text into fancy Unicode styles. Generate bold, italic, strikethrough, and more.
→
Flip a Coin
Flip a virtual coin. Get heads or tails with a satisfying animation. Track your flip history.
→
Gematria Calculator
Calculate the numerical value of words and phrases. English ordinal and reduced gematria.
→
Love Calculator
Calculate the love compatibility between two names. Fun algorithm that produces consistent results f...
→
Lucky Number Generator
Generate your lucky numbers based on your name and birth date. Fun numerology tool.
→
Magic 8 Ball
Ask the Magic 8 Ball a yes or no question and shake to reveal your answer. All 20 classic answers in...
→
Magic 8-Ball
Ask the Magic 8-Ball any yes or no question. Shake for your answer from the mystical oracle.
→
Morse Code Translator
Translate text to Morse code and back. See dots and dashes for any message.
→
Number Guessing Game
Guess the secret number between 1 and 100. Get hints after each guess. How few tries can you do it i...
→
Pig Latin Translator
Translate English text to Pig Latin and back. A fun language game that rearranges word beginnings.
→
Pig Latin Translator
Translate English to Pig Latin and back. A classic word game for kids and adults.
→
Pizza Calculator
Calculate how many pizzas to order for your group. Based on hunger level and pizza size.
→
Random Fact Generator
Learn something new with random interesting facts. Covering science, history, nature, and more.
→
Random Joke Generator
Get random clean jokes. Click for the setup, then reveal the punchline. Family-friendly humor.
→
Random Name Generator
Generate random names for characters, babies, or usernames. Filter by gender and origin.
→
Random Quote Generator
Get inspired with random quotes from famous thinkers, leaders, and creators. Click to generate a new...
→
Random Quote Generator
Get inspired with random quotes from famous people. Click for a new quote. Share and copy easily.
→
Reaction Time Test
Test your reaction speed. Click as fast as you can when the screen turns green.
→
Rock Paper Scissors
Play Rock Paper Scissors against the computer. Track your wins, losses, and draws.
→
Sarcasm Text Generator
Convert text to sarcastic alternating caps. Perfect for mocking memes and social media.
→
Snow Day Predictor
A fun snow day predictor. Enter weather conditions and see your chances of a snow day.
→
Spin the Wheel
Customizable spinning wheel for random selection. Add your own options and spin to decide.
→
Trivia Quiz
Test your knowledge with random trivia questions across multiple categories. Track your score.
→
Truth or Dare Generator
Random truth or dare generator for parties and game nights. Clean, fun questions and challenges.
→
World Population Clock
See the estimated current world population in real-time. Watch it grow with births and deaths.
→
World Population Clock
See the estimated current world population with a live counter. Updated in real-time.
→
Would You Rather
Random "Would You Rather" questions for parties, road trips, and ice breakers. Fun dilemmas to debat...
→
Would You Rather
Play Would You Rather with challenging and funny scenarios. Great for parties and icebreakers.
→
Zalgo Text Generator
Generate creepy Zalgo text with diacritical marks. Adjust the intensity of the glitch effect.
→
Zodiac Sign Finder
Find your zodiac sign from your birth date. See your element, ruling planet, and traits.
→
Games 6
Color Memory Game
Simon Says-style memory game. Watch the color sequence, then repeat it from memory. How far can you ...
→
Number Guessing Game
Guess the secret number between 1 and 100. Get hot/cold hints after each guess. How few tries can yo...
→
Reaction Time Test
Test your reaction time. Click as fast as you can when the screen turns green. See your average over...
→
Rock Paper Scissors
Play Rock Paper Scissors against the computer. Track your wins, losses, and draws.
→
Speed Math Quiz
Test your mental math skills with timed arithmetic problems. Track your score and speed across diffi...
→
Tic Tac Toe
Play Tic Tac Toe against the computer. Classic 3x3 grid game with score tracking.
→
Garden 4
Garden Soil Calculator
Calculate how much soil you need for raised beds and garden plots. Results in cubic feet and bags.
→
Mulch Calculator
Calculate how much mulch you need for your garden beds. Results in cubic yards and bags.
→
Mulch Calculator
Calculate how much mulch you need for garden beds. Results in cubic yards and bags.
→
Soil Calculator
Calculate how much soil or compost you need for raised beds, gardens, and pots.
→
Generator 6
Coin Flipper
Flip a virtual coin for heads or tails. Track results with statistics. Flip multiple coins at once.
→
Dice Roller
Roll virtual dice of any type: d4, d6, d8, d10, d12, d20, d100. Roll multiple dice and see individua...
→
Lorem Ipsum Generator
Generate placeholder text (lorem ipsum) in paragraphs, sentences, or words. Classic and random optio...
→
QR Code Generator
Generate QR codes for any text or URL. Download as PNG. Free online QR code maker — no sign-up requi...
→
Random Number Generator
Generate random numbers within a range. Configure minimum, maximum, quantity, uniqueness, and sortin...
→
Word Scrambler
Scramble words in your text randomly. Keep first and last letters in place or fully randomize. Fun t...
→
Health 44
BAC Calculator
Estimate blood alcohol content based on drinks consumed, weight, gender, and time.
→
Blood Alcohol Calculator
Estimate your Blood Alcohol Content (BAC) based on drinks consumed, body weight, and time elapsed. F...
→
Blood Alcohol Calculator
Estimate your blood alcohol content (BAC) based on drinks consumed, weight, gender, and time.
→
Blood Alcohol Estimator
Estimate your blood alcohol content (BAC) based on drinks consumed, body weight, and time elapsed.
→
Blood Type Compatibility
Check blood type compatibility for donations and transfusions. See which blood types can give to and...
→
Blood Type Compatibility
Check blood type compatibility for donations and transfusions. See who can give and receive.
→
BMI Calculator
Calculate your Body Mass Index (BMI) with metric or imperial units. Shows your BMI category and heal...
→
BMI Prime Calculator
Calculate BMI Prime — your BMI relative to the upper normal limit (25). Values below 1.0 are healthy...
→
BMR Calculator
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Find how many calories your ...
→
Body Fat Calculator
Estimate your body fat percentage using the US Navy method or BMI-based estimation. Enter your measu...
→
Body Fat Calculator
Estimate your body fat percentage using the US Navy method. Enter measurements for an accurate estim...
→
Body Fat Calculator
Estimate body fat percentage using the US Navy method. Enter your measurements for an estimate.
→
Body Surface Area Calculator
Calculate body surface area (BSA) using the Du Bois and Mosteller formulas. Used in medical dosing.
→
Caffeine Calculator
Track your daily caffeine intake. See how long caffeine stays in your system.
→
Caffeine Half-Life Calculator
Track how caffeine metabolizes in your body over time. See when caffeine levels drop below the sleep...
→
Daily Calorie Calculator
Calculate your daily caloric needs using the Mifflin-St Jeor equation. Factor in activity level for ...
→
Due Date Calculator
Calculate your estimated due date from your last menstrual period (LMP) or conception date.
→
Due Date Calculator
Calculate your estimated due date from your last menstrual period. See trimester milestones.
→
Heart Rate Zone Calculator
Calculate your training heart rate zones based on your max heart rate. See Zone 1-5 ranges for fat b...
→
Heart Rate Zone Calculator
Calculate your training heart rate zones based on age. See fat burn, cardio, and peak zones.
→
Ideal Weight Calculator
Calculate your ideal body weight using multiple formulas: Devine, Robinson, Miller, and Hamwi. Compa...
→
Ideal Weight Calculator
Calculate your ideal weight based on height using multiple formulas: Hamwi, Devine, Robinson, Miller...
→
Ideal Weight Calculator
Calculate your ideal weight using multiple formulas. Compare Devine, Robinson, Miller, and Hamwi met...
→
Macro Calculator
Calculate your daily macronutrient needs (protein, carbs, fat) based on your TDEE and fitness goal. ...
→
Macro Calculator
Calculate your daily macronutrient needs. Get protein, carbs, and fat targets based on your goals.
→
Macro Calculator
Calculate your daily macronutrient needs. Get protein, carbs, and fat targets based on your goal.
→
Pregnancy Due Date Calculator
Calculate your estimated due date based on the first day of your last menstrual period (LMP). See tr...
→
Pregnancy Due Date Calculator
Calculate your estimated due date based on the first day of your last menstrual period.
→
Pregnancy Week by Week
See what's happening in each week of pregnancy. Baby size, development milestones, and what to expec...
→
Pregnancy Weight Gain Tracker
Track recommended weight gain during pregnancy based on pre-pregnancy BMI and current week.
→
Protein Intake Calculator
Calculate your daily protein needs based on weight, activity level, and fitness goals.
→
Protein Intake Calculator
Calculate your recommended daily protein intake based on body weight and activity level.
→
Screen Time Calculator
Calculate your weekly screen time and see how it compares to recommendations.
→
Sleep Calculator
Calculate the best times to wake up or go to sleep based on 90-minute sleep cycles. Wake up refreshe...
→
Sleep Calculator
Calculate the best time to go to sleep or wake up based on 90-minute sleep cycles.
→
Sleep Debt Calculator
Calculate how much sleep debt you have accumulated. See how long it takes to recover.
→
TDEE Calculator
Calculate your Total Daily Energy Expenditure. Know exactly how many calories you burn per day inclu...
→
TDEE Calculator
Calculate your Total Daily Energy Expenditure. Know exactly how many calories you burn per day.
→
Waist-to-Hip Ratio
Calculate your waist-to-hip ratio and assess health risk. WHR is an indicator of cardiovascular heal...
→
Waist-to-Hip Ratio
Calculate your waist-to-hip ratio and assess health risk. A key indicator of cardiovascular health.
→
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio to assess health risk. WHR is an indicator of metabolic health.
→
Water Intake Calculator
Calculate how much water you should drink daily based on your weight, activity level, and climate. S...
→
Water Intake Calculator
Calculate your recommended daily water intake based on weight, activity level, and climate.
→
Water Intake Calculator
Calculate how much water you should drink daily based on weight, activity level, and climate.
→
Home 16
Candle Burn Time
Estimate how long a candle will burn based on its weight and wick type.
→
Deck Board Calculator
Calculate how many deck boards you need. Enter deck dimensions and board size.
→
Deck Calculator
Estimate decking materials needed. Calculate boards, joists, and screws for your deck project.
→
Electricity Cost Calculator
Calculate how much electricity an appliance costs to run. Enter wattage, hours, and rate.
→
Fence Calculator
Calculate fencing materials needed. Get post count, rails, and picket estimates.
→
Fence Calculator
Calculate materials needed to build a fence. Posts, rails, and pickets.
→
Flooring Calculator
Calculate how much flooring material you need. Enter room dimensions and get square footage with was...
→
Flooring Calculator
Calculate how much flooring material you need. Supports square feet and accounts for waste.
→
Paint Calculator
Calculate how much paint you need for a room. Enter wall dimensions and get gallons/liters needed.
→
Paint Calculator
Calculate how much paint you need for a room. Enter dimensions to get gallons needed.
→
Paint Calculator
Calculate how much paint you need for a room. Enter wall dimensions and get gallons needed.
→
Pool Volume Calculator
Calculate swimming pool volume in gallons and liters. Supports rectangular and round pools.
→
Pool Volume Calculator
Calculate swimming pool water volume in gallons. Supports rectangular, round, and oval pools.
→
Tile Calculator
Calculate how many tiles you need for a floor or wall. Account for different tile sizes and waste.
→
Wallpaper Calculator
Calculate how many rolls of wallpaper you need for a room. Account for windows and doors.
→
Wallpaper Calculator
Calculate how many rolls of wallpaper you need for a room.
→
Lifestyle 18
Birth Flower Calculator
Find your birth flower based on your birth month. Learn the meaning and symbolism of each flower.
→
Birthstone Calculator
Find your birthstone based on your birth month. Learn about gemstone meaning, color, and properties.
→
Bra Size Converter
Convert bra sizes between US, UK, EU, and French sizing systems.
→
Chinese Zodiac Calculator
Find your Chinese zodiac animal based on your birth year. Learn about the 12 animals and elements.
→
Clothing Size Converter
Convert clothing sizes between US, UK, EU, and Asian sizing systems. Covers tops, pants, and dresses...
→
Cooking Unit Converter
Convert between cooking measurements: cups, tablespoons, teaspoons, milliliters, ounces, and more.
→
Grocery List Maker
Create and organize your grocery shopping list. Check off items as you shop.
→
Life Path Number Calculator
Calculate your numerology life path number from your birthday. Discover your destiny number meaning.
→
Life Path Number Calculator
Calculate your numerology Life Path Number from your birthdate. Discover your personality traits.
→
Name Meaning Lookup
Look up the meaning and origin of popular names. Discover the history behind your name.
→
Oven Temperature Converter
Convert oven temperatures between Fahrenheit, Celsius, Gas Mark, and descriptive terms (low, moderat...
→
Pet Age Calculator
Convert your dog or cat age to human years. Uses updated formulas based on breed size and actual agi...
→
Ring Size Converter
Convert ring sizes between US, UK, EU, and diameter in millimeters.
→
Screen Time Calculator
Calculate how much time you spend on screens daily and annually. See the impact on your life.
→
Shoe Size Converter
Convert shoe sizes between US, UK, EU, and CM. Covers men, women, and children sizes.
→
Wedding Budget Calculator
Plan your wedding budget. See recommended allocations for venue, food, photography, and more.
→
Zodiac Sign Calculator
Find your zodiac sign based on your birthday. Learn about your sun sign traits and compatibility.
→
Zodiac Sign Calculator
Find your zodiac sign from your birthday. See your sign traits, element, and ruling planet.
→
Marketing 3
Email Subject Line Tester
Test your email subject lines for spam triggers, length, personalization, and effectiveness. Avoid t...
→
UTM Link Builder
Build UTM-tagged URLs for campaign tracking. Generate links with source, medium, campaign parameters...
→
UTM Link Builder
Build UTM-tagged URLs for campaign tracking. Generate links with source, medium, and campaign parame...
→
Math 54
Angle Converter
Convert between degrees, radians, gradians, turns, and arc minutes/seconds.
→
Area Calculator
Calculate the area of common shapes: circle, rectangle, triangle, trapezoid, ellipse, parallelogram,...
→
Average Calculator
Calculate mean, median, mode, and range for a set of numbers. Enter values separated by commas.
→
Binary Calculator
Perform arithmetic operations on binary numbers. Add, subtract, multiply, and divide in binary.
→
Binary Calculator
Perform arithmetic operations on binary numbers. Add, subtract, multiply, and divide in binary.
→
Binary to Decimal Converter
Convert between binary, decimal, hexadecimal, and octal number systems instantly.
→
Circle Calculator
Calculate area, circumference, and diameter from any circle measurement.
→
Cone Calculator
Calculate volume and surface area of a cone from radius and height.
→
Cylinder Calculator
Calculate volume and surface area of a cylinder from radius and height.
→
Exponent Calculator
Calculate powers and exponents. Enter any base and exponent to get the result, including fractional ...
→
Factorial Calculator
Calculate the factorial of any number. Also shows permutations and combinations.
→
Fibonacci Calculator
Calculate Fibonacci numbers. See the sequence up to any position and the golden ratio.
→
Fibonacci Sequence Generator
Generate Fibonacci numbers up to any position. See the golden ratio convergence and individual terms...
→
Fibonacci Sequence Generator
Generate Fibonacci numbers. See the sequence, golden ratio convergence, and individual terms.
→
Fraction Calculator
Add, subtract, multiply, and divide fractions. Shows step-by-step solution and simplifies results.
→
Hex Calculator
Perform arithmetic with hexadecimal numbers. Add, subtract, multiply hex values and see results in h...
→
Logarithm Calculator
Calculate logarithms with any base. Natural log (ln), common log (log₁₀), and custom base logarithms...
→
Logarithm Calculator
Calculate logarithms in any base. Supports natural log (ln), log base 10, log base 2, and custom bas...
→
Matrix Determinant
Calculate the determinant of a 2x2 or 3x3 matrix. Enter matrix values to get the result.
→
Matrix Determinant Calculator
Calculate the determinant of 2×2 and 3×3 matrices. Enter matrix values and get the determinant insta...
→
Matrix Determinant Calculator
Calculate the determinant of a 2x2 or 3x3 matrix. Enter matrix values and see the result.
→
Mean Median Mode Calculator
Calculate the mean, median, mode, range, and other central tendency measures from a dataset.
→
Mean, Median, Mode
Calculate mean, median, and mode from a data set. See all central tendency measures.
→
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal. Enter in any base and see all conve...
→
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Supports any base from 2 to 36.
→
Number Formatter
Format numbers with commas, different decimal places, scientific notation, currency, and various loc...
→
Percentage Change Calculator
Calculate the percentage increase or decrease between two values. See the absolute and relative chan...
→
Percentage Change Calculator
Calculate the percentage change between two numbers. See increase, decrease, and difference.
→
Percentage of a Number
Calculate what percentage of a number is. Find X% of Y, what % X is of Y, and percentage increase/de...
→
Permutation & Combination
Calculate permutations (nPr) and combinations (nCr) from n and r values.
→
Prime Factorization Calculator
Find the prime factorization of any number. See all prime factors displayed as a factor tree.
→
Prime Number Checker
Check if a number is prime. Shows factors if composite. Also find prime numbers in a range.
→
Prime Number Checker
Check if a number is prime. See the nearest primes and prime factorization.
→
Probability Calculator
Calculate probability, odds, and combinations. Enter favorable and total outcomes.
→
Pythagorean Theorem
Calculate the missing side of a right triangle using a\u00B2 + b\u00B2 = c\u00B2.
→
Quadratic Equation Solver
Solve quadratic equations ax\u00B2 + bx + c = 0. Shows discriminant, roots, and vertex form.
→
Quadratic Equation Solver
Solve quadratic equations ax\u00B2 + bx + c = 0. Find roots, discriminant, and vertex.
→
Ratio Calculator
Solve ratios, find missing values, simplify ratios, and scale proportionally. Enter A:B = C:? to fin...
→
Ratio Calculator
Solve proportions and ratios. If A:B = C:?, find the missing value.
→
Roman Numeral Converter
Convert between Arabic numbers (1, 2, 3...) and Roman numerals (I, II, III...). Supports values from...
→
Roman Numeral Converter
Convert between decimal numbers and Roman numerals. Supports values from 1 to 3999.
→
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals. Enter either format for instant conversion.
→
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals. Supports values up to 3999.
→
Scientific Notation Converter
Convert numbers to and from scientific notation. See the coefficient, exponent, and engineering nota...
→
Scientific Notation Converter
Convert between standard numbers and scientific notation. Enter a number to see its scientific form.
→
Scientific Notation Converter
Convert between decimal numbers and scientific notation. Handle very large and very small numbers.
→
Sphere Calculator
Calculate volume and surface area of a sphere from its radius.
→
Standard Deviation Calculator
Calculate the standard deviation, variance, mean, median, and other statistical measures from a data...
→
Standard Deviation Calculator
Calculate mean, variance, and standard deviation for a set of numbers. Enter values separated by com...
→
Standard Deviation Calculator
Calculate mean, variance, and standard deviation from a set of numbers.
→
Surface Area Calculator
Calculate the surface area of 3D shapes: sphere, cube, cylinder, cone, and rectangular prism.
→
Triangle Calculator
Calculate area, perimeter, and angles of a triangle from three side lengths.
→
Trigonometry Calculator
Calculate sin, cos, tan, and their inverses. Enter angles in degrees or radians.
→
Volume Calculator
Calculate the volume of 3D shapes: sphere, cube, cylinder, cone, pyramid, and rectangular prism.
→
Music 5
BPM Calculator
Tap to calculate beats per minute. Click the button rhythmically to find the tempo of any song.
→
BPM Counter
Tap to find the tempo of any song. Click in rhythm and see the beats per minute.
→
Guitar Tuner Reference
Reference tones for standard guitar tuning. Play each string\u2019s note to tune by ear.
→
Metronome
A digital metronome for musicians. Set any tempo and hear a steady click track.
→
Music Note Frequency
Find the frequency of any musical note. See the relationship between notes, octaves, and Hz.
→
Network 6
DNS Record Types Reference
Reference guide for all DNS record types including A, AAAA, CNAME, MX, TXT, NS, SOA, and more with d...
→
IP Address Lookup
Look up information about any IP address including geolocation, ISP, and network details. Also shows...
→
IP Address Lookup
Find your public IP address and see related network information like user agent and screen details.
→
IP Subnet Calculator
Calculate IP subnet details from an IP address and CIDR prefix length. Get network address, broadcas...
→
Subnet Calculator
Calculate subnet details from an IP address and CIDR notation. Find network address, broadcast, and ...
→
What's My IP Address
Find your public IP address, user agent, browser info, and screen resolution. No tracking or logging...
→
Networking 2
Other 1
Parenting 2
Pet 2
Pets 3
Cat Years Calculator
Convert cat years to human years. Cats age differently in their first two years.
→
Dog Years Calculator
Convert dog years to human years using the modern formula that accounts for breed size.
→
Pet Food Calculator
Calculate how much to feed your dog or cat based on weight, age, and activity level.
→
Photography 5
DPI/PPI Calculator
Calculate print size from image resolution and DPI. Find the optimal print dimensions.
→
Image Crop Size Calculator
Calculate image dimensions after cropping to a specific aspect ratio. See what you keep and lose.
→
Image File Size Estimator
Estimate image file size based on dimensions, color depth, and compression.
→
Photo Exposure Calculator
Calculate correct camera exposure settings. Adjust aperture, shutter speed, and ISO for perfect expo...
→
Photo Resolution Calculator
Calculate print size from pixel dimensions and DPI. Know the maximum print quality for your photos.
→
Productivity 13
Habit Tracker
Track your daily habits with a simple visual tracker. Mark habits complete and see your streaks.
→
Habit Tracker
Track your daily habits. Mark habits complete each day and see your streaks build up.
→
Habit Tracker
Track your daily habits with a simple checklist. Build streaks and stay consistent.
→
Keyboard Shortcuts Cheatsheet
Browse common keyboard shortcuts for Windows, macOS, VS Code, Chrome, and more. Searchable reference...
→
Pomodoro Timer
Productivity timer using the Pomodoro Technique: 25-minute work sessions with 5-minute breaks. Confi...
→
Pomodoro Timer
Stay focused with the Pomodoro technique. 25-minute work sessions followed by 5-minute breaks. Custo...
→
Pomodoro Timer
Stay productive with the Pomodoro technique. 25 minutes of focused work followed by 5-minute breaks.
→
Pomodoro Timer
A focused work timer using the Pomodoro Technique. 25 minutes of focus, 5 minutes break.
→
Quick Notes
A simple notepad that saves to your browser. Write notes, ideas, and reminders. Auto-saves.
→
To-Do List
A simple, clean to-do list. Add tasks, mark them done, and clear completed items.
→
Typing Speed Test
Test your typing speed and accuracy with a timed challenge. See your WPM (words per minute), accurac...
→
Typing Speed Test
Test your typing speed with words per minute (WPM) and accuracy measurements. Improve your typing sk...
→
Typing Speed Test
Test your typing speed in words per minute. Type the given passage as fast and accurately as you can...
→
Random 3
Dice Roller
Roll virtual dice with customizable sides (d4, d6, d8, d10, d12, d20, d100). Roll multiple dice and ...
→
Flip a Coin
Flip a virtual coin and get heads or tails. Track your flip history and see the statistical distribu...
→
Random Name Generator
Generate random first names, last names, and full names. Filter by gender. Great for testing, writin...
→
Real Estate 5
Closing Cost Estimator
Estimate closing costs when buying a home. Typical costs are 2-5% of the purchase price.
→
Home Affordability Calculator
Calculate how much house you can afford based on your income, debts, and down payment.
→
How Much House Can I Afford?
Calculate how much house you can afford based on income, debts, and down payment.
→
Property Tax Calculator
Estimate your annual property tax based on home value and local tax rate.
→
Property Tax Estimator
Estimate annual property taxes based on home value and local tax rate.
→
Reference 2
SEO 18
.htaccess Redirect Generator
Generate .htaccess redirect rules. Create 301 redirects, force HTTPS, and configure URL rewrites.
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Domain Age Estimator
Estimate how old a domain is based on its registration date. Enter a domain to check.
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Keyword Density Checker
Analyze keyword density in your text. See word frequency and identify over-optimized content.
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Meta Description Checker
Check your meta description length and quality. Optimal length is 150-160 characters for search engi...
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Meta Tag Generator
Generate HTML meta tags for SEO — title, description, Open Graph, Twitter Cards. Preview how your pa...
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Meta Tag Generator
Generate HTML meta tags for your website. Create title, description, Open Graph, and Twitter card ta...
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Meta Tag Generator
Generate HTML meta tags for SEO. Create title, description, Open Graph, and Twitter card tags.
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Open Graph Preview
Preview how your page will look when shared on Facebook, Twitter/X, and LinkedIn. Enter your Open Gr...
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Open Graph Preview
Preview how your page looks when shared on Facebook, Twitter, and LinkedIn. Test your Open Graph tag...
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Open Graph Preview
Preview how your page will look when shared on Facebook, Twitter, and LinkedIn.
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robots.txt Generator
Generate a robots.txt file for your website. Control which search engine crawlers can access which p...
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Robots.txt Generator
Generate a robots.txt file for your website. Control which pages search engines can crawl.
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Robots.txt Generator
Generate a robots.txt file for your website. Control which pages search engines can crawl.
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Schema Markup Generator
Generate JSON-LD schema markup for your website. Supports Article, Product, FAQ, LocalBusiness, and ...
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URL Slug Generator
Convert any text into a clean, SEO-friendly URL slug. Removes special characters, replaces spaces wi...
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URL Slug Generator
Convert any text to a URL-friendly slug. Remove special characters, spaces, and accents.
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XML Sitemap Generator
Generate XML sitemaps for your website. Add URLs and set priority, change frequency, and last modifi...
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XML Sitemap Generator
Generate an XML sitemap for your website. Enter your URLs to create a search engine friendly sitemap...
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Science 28
Acceleration Calculator
Calculate acceleration from initial velocity, final velocity, and time. Also compute distance travel...
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Day Length Calculator
See how much daylight you get based on your latitude and time of year.
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Decibel Calculator
Compare decibel levels and understand sound intensity. See how loud common sounds are.
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Density Calculator
Calculate density, mass, or volume using the formula D = M/V. Enter any two values to find the third...
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Density Calculator
Calculate density from mass and volume. Find any of the three values given the other two.
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Dilution Calculator
Calculate dilution using C1V1 = C2V2 formula. Find any missing variable.
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Energy Converter
Convert between energy units: Joules, calories, kWh, BTU, electron volts, and foot-pounds.
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Force Calculator (F=ma)
Calculate force, mass, or acceleration using Newton second law F = ma.
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Frequency Converter
Convert between frequency units: Hz, kHz, MHz, GHz, THz. Also shows period and wavelength.
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Gravity Calculator
Calculate gravitational force between two masses. Compare your weight on different planets.
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Half-Life Calculator
Calculate radioactive decay and remaining substance after a given time using the half-life formula.
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Half-Life Calculator
Calculate radioactive decay. Find remaining amount after a given number of half-lives.
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Ideal Gas Law Calculator
Calculate pressure, volume, temperature, or moles using PV = nRT. The ideal gas equation calculator.
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Light Year Calculator
Convert between light years, parsecs, astronomical units, kilometers, and miles for space distances.
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Light Year Calculator
Convert between light years, kilometers, miles, and astronomical units.
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Moon Phase Calculator
See the current moon phase and upcoming lunar events. Know when the next full moon is.
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Periodic Table Lookup
Look up chemical elements by name, symbol, or atomic number. See properties and details.
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Periodic Table of Elements
Interactive periodic table with element details. Search by name, symbol, or atomic number. Click any...
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pH Calculator
Calculate pH from hydrogen ion concentration. See whether a solution is acidic, neutral, or basic.
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pH Calculator
Calculate pH from hydrogen ion concentration or vice versa. See acidity/alkalinity level.
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Power Converter
Convert between power units: Watts, kilowatts, horsepower, BTU/hour, and foot-pounds per second.
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Pressure Converter
Convert between pressure units: PSI, bar, atm, Pascal, mmHg, and kPa.
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Sound Wavelength Calculator
Calculate sound wavelength from frequency. See what note corresponds to a frequency.
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Speed of Sound Calculator
Calculate the speed of sound in air at different temperatures. Also shows Mach number conversions.
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Speed of Sound Calculator
Calculate the speed of sound at different temperatures and altitudes.
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Wavelength \u2194 Frequency
Convert between wavelength and frequency. See the electromagnetic spectrum location.
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Wavelength Calculator
Calculate wavelength from frequency, or frequency from wavelength. Speed of light, sound, and custom...
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Wavelength-Frequency Calculator
Convert between wavelength, frequency, and energy for electromagnetic waves.
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Security 7
CSP Header Generator
Generate Content Security Policy headers visually. Protect your website from XSS and data injection ...
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Hash Generator (SHA/MD5)
Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes from text. Cryptographic hashing done entirely in y...
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htpasswd Generator
Generate Apache .htpasswd entries for basic HTTP authentication. Supports bcrypt and MD5 hashing.
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Password Generator
Generate strong, random passwords with configurable length and character sets. Includes password str...
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Password Generator
Generate strong, secure passwords with customizable length and character sets. Never reuse passwords...
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Password Strength Checker
Check how strong your password is. Get a score, estimated crack time, and suggestions to improve it.
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Password Strength Checker
Check how strong your password is. See estimated crack time and get improvement suggestions.
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Social 2
Social Media 6
Hashtag Generator
Generate relevant hashtags for your social media posts. Enter a topic and get popular hashtag sugges...
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Hashtag Generator
Generate relevant hashtags for your social media posts. Enter a topic to get suggested hashtags.
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Instagram Caption Counter
Count characters for Instagram captions and bios. Check against the 2,200 character caption limit an...
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Social Media Character Counter
Count characters for Twitter/X (280), Instagram (2200), LinkedIn (3000), and other social platforms.
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Social Media Image Sizes
Reference guide for all social media image and video dimensions. Covers Instagram, Facebook, Twitter...
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Twitter Character Counter
Count characters for Twitter/X posts. See remaining characters with real-time feedback. Supports thr...
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Tech 7
Battery Life Calculator
Estimate battery life from capacity and power consumption. Calculate runtime for any device.
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Data Storage Converter
Convert between bytes, KB, MB, GB, TB, and PB. See exact values for both binary and decimal.
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Download Time Calculator
Calculate how long a file will take to download at your internet speed.
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Internet Speed Calculator
Calculate the internet speed you need based on your household usage and number of devices.
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TV Viewing Distance
Calculate the optimal viewing distance for your TV size based on resolution.
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VPN Speed Calculator
Estimate your internet speed loss when using a VPN based on encryption and distance.
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WiFi Signal Guide
Understand WiFi signal strength in dBm. See what your signal level means for performance.
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Text 19
Accent Remover
Remove diacritical marks and accents from text. Convert é→e, ü→u, ñ→n, etc.
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Anagram Checker
Check if two words or phrases are anagrams of each other. An anagram uses the same letters rearrange...
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Backwards Text Generator
Reverse your text, words, or sentences. Create mirror text, flip words, or reverse word order.
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Emoji Remover
Remove all emojis and special unicode characters from text. Get clean, plain text output.
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Fancy Text Generator
Convert plain text to fancy Unicode text styles. Bold, italic, script, and more.
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Invisible Character Detector
Detect and remove invisible, zero-width, and hidden characters from text. Find hidden Unicode charac...
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NATO Phonetic Alphabet
Convert text to the NATO phonetic alphabet. Spell out words clearly: Alpha, Bravo, Charlie...
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Palindrome Checker
Check if a word, phrase, or number is a palindrome. Ignores spaces, punctuation, and case.
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Pig Latin Translator
Translate English text to Pig Latin and back. A fun word game that rearranges syllables.
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Reverse Text Generator
Reverse any text, flip it upside down, or mirror it. Multiple reversal modes.
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Small Text Generator
Convert text to superscript, subscript, and small caps Unicode characters. Copy and paste anywhere.
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Syllable Counter
Count the number of syllables in words and sentences. Useful for poetry, haiku, and readability anal...
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Text Diff Checker
Compare two texts and highlight the differences. See additions, deletions, and changes side by side.
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Text Encryption Tool
Encrypt and decrypt text using Caesar cipher, ROT13, Atbash, and custom shift values.
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Text to ASCII Art
Convert text to ASCII art using block characters. Create large text banners for terminals and commen...
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Text to Speech
Convert text to speech using your browser. Choose voice, speed, and pitch. Listen to any text read a...
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Unicode Character Lookup
Look up any character Unicode code point, name, and encoding. Enter a character or code point.
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Word Frequency Counter
Analyze word frequency in your text. See which words appear most often with counts and percentages.
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Zalgo Text Generator
Create creepy Zalgo text with combining Unicode characters. Adjust the intensity of the glitch effec...
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Text Analysis 8
Character Counter
Count characters in your text with and without spaces in real-time. Set character limits and get ins...
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Numbers to Words Converter
Convert any number to its written English form. For example: 1234 → "one thousand two hundred thirty...
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Paragraph Counter
Count paragraphs in your text. Paragraphs are separated by blank lines. Also shows word and sentence...
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Readability Score Calculator
Calculate Flesch-Kincaid, Gunning Fog, Coleman-Liau, SMOG, and Automated Readability Index scores fo...
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Sentence Counter
Count the number of sentences in your text with smart detection of periods, question marks, and excl...
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Text Compare
Compare two texts side-by-side and see the differences highlighted. Find additions, deletions, and u...
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Word Counter
Count words, sentences, paragraphs, and estimate reading time and speaking time. Free online word co...
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Words to Numbers Converter
Convert written numbers in words (e.g. "one hundred twenty three") to digits (123). Supports numbers...
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Text Transformation 17
camelCase Converter
Convert any text to camelCase format for programming. Removes spaces and capitalizes each word excep...
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Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-c...
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Duplicate Line Remover
Remove duplicate lines from your text instantly. Keep only unique lines. Shows count of duplicates r...
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Empty Line Remover
Remove blank and empty lines from your text. Clean up text formatting instantly.
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Extra Space Remover
Collapse multiple spaces into single spaces and trim leading/trailing whitespace from your text.
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kebab-case Converter
Convert text to kebab-case format. Replaces spaces with hyphens. Used in CSS classes and URL slugs.
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Line Break Remover
Remove line breaks and join text into a single paragraph. Choose your delimiter: space, comma, or cu...
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Lowercase Converter
Convert any text to lowercase instantly. Free online text case converter tool.
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Sentence Case Converter
Convert text to sentence case — capitalize the first letter of each sentence. Free online tool.
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snake_case Converter
Convert text to snake_case format. Replaces spaces with underscores and lowercases everything. Used ...
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Strikethrough Text Generator
Generate s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶ text using Unicode combining characters. Copy and paste on socia...
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Text Line Sorter
Sort lines of text alphabetically, numerically, by length, in reverse, or randomly. Free online line...
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Text Repeater
Repeat any text multiple times with configurable separator. Useful for testing, filler text, and dat...
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Text Reverser
Reverse text, words, or sentences instantly. Multiple reverse modes available. Free online text reve...
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Title Case Converter
Convert text to Title Case with smart capitalization. Keeps articles and prepositions lowercase. Fre...
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Uppercase Converter
Convert any text to UPPERCASE instantly. Free online text case converter tool. Copy result with one ...
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Upside Down Text Generator
Flip your text upside down using special Unicode characters. Copy and paste anywhere. Fun text gener...
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Travel 6
Distance Between Cities
Calculate the approximate distance between major world cities using the Haversine formula.
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Flight Time Estimator
Estimate flight time between cities based on distance. See approximate duration and jet lag risk.
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Jet Lag Calculator
Calculate expected jet lag based on timezone difference and travel direction. Get recovery tips.
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Packing List Generator
Generate a customized packing list for your trip. Select destination type, duration, and activities.
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Travel Money Calculator
Calculate how much foreign currency you need for a trip. Plan your travel budget.
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Travel Packing Checklist
A customizable packing checklist for travel. Check off items as you pack them.
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Utilities 27
Appliance Usage Estimator
Estimate electricity usage and cost for common household appliances. Compare energy consumption.
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Bandwidth Calculator
Calculate file download/upload time based on internet speed. Plan your data transfers.
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Barcode Generator
Generate Code 128 barcodes from text or numbers. Perfect for inventory and labels.
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Battery Life Calculator
Calculate how long a battery will last based on capacity (mAh) and device power consumption.
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Battery Life Calculator
Calculate how long a battery will last based on capacity and device power consumption.
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Data Storage Converter
Convert between bytes, KB, MB, GB, TB, and PB. Both decimal (SI) and binary (IEC) systems.
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Date Add/Subtract
Add or subtract days, weeks, months, or years from any date. Find future and past dates.
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Date Difference Calculator
Calculate the difference between two dates in days, weeks, months, and years.
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Day Length Calculator
Calculate approximate sunrise, sunset, and day length based on date and latitude.
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Electricity Bill Calculator
Estimate your electricity bill. Add your appliances with wattage and usage hours to see total cost.
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Electricity Cost Calculator
Calculate the electricity cost of running an appliance. Enter wattage, hours, and electricity rate.
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Electricity Cost Calculator
Calculate the cost of running an electrical appliance. Enter wattage, hours, and rate.
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Internet Speed Calculator
Calculate internet speed requirements based on your household usage. See recommended download and up...
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Internet Speed Estimator
Estimate your internet speed and what activities it supports. See bandwidth requirements.
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Leap Year Checker
Check if a year is a leap year. See the next and previous leap years.
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Military Time Converter
Convert between 12-hour and 24-hour (military) time format. Also known as the NATO time system.
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Moon Phase Calculator
See the current moon phase and upcoming phases. Know when the next full and new moon occur.
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Moving Cost Estimator
Estimate your moving costs based on distance, home size, and service level.
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Online Stopwatch
A simple online stopwatch with lap tracking. Start, stop, and record split times.
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QR Code Generator
Generate QR codes for URLs, text, WiFi, and more. Download as image for use anywhere.
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QR Code Generator
Generate QR codes for URLs, text, WiFi credentials, and more. Download your QR code instantly.
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QR Code Generator
Generate QR codes for URLs, text, WiFi, and more. Free and instant QR code creation.
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Stopwatch
A precise digital stopwatch with lap timing. Start, stop, reset, and record lap times.
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Time Zone Converter
Convert times between time zones. Find what time it is in another city.
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Week Number Calculator
Find the ISO week number for any date. See which week of the year it is.
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World Clock
See the current time in major cities around the world. Compare time zones at a glance.
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Your IP Address
See your current IP address and device information. View your browser and OS details.
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Video 2
Weather 3
Dew Point Calculator
Calculate dew point temperature from air temperature and relative humidity.
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Heat Index Calculator
Calculate the heat index (feels-like temperature) from temperature and humidity.
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Wind Chill Calculator
Calculate wind chill factor. How cold it really feels with wind and temperature combined.
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Wellness 5
Breathing Exercise
Guided box breathing exercise. Follow the animated guide for inhale, hold, exhale, and hold.
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Breathing Exercise Timer
Guided breathing exercises for relaxation and focus. Includes 4-7-8, box breathing, and custom patte...
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Daily Affirmation
Get a positive affirmation to start your day. Click for a new one or save your favorites.
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Daily Affirmation Generator
Start your day with a positive affirmation. Random uplifting statements for motivation and mindfulne...
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Meditation Timer
A simple, beautiful meditation timer with customizable duration. Hear a gentle tone when time is up.
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Writing 20
Headline Analyzer
Score your blog headlines and titles for emotional impact, power words, word balance, and length. Im...
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Headline Analyzer
Analyze your blog post headline for SEO and engagement. Get a score and suggestions.
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Line Sorter
Sort lines of text alphabetically, numerically, or by length. Remove duplicates and reverse order.
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Morse Code Translator
Convert text to Morse code and Morse code back to text. See dots and dashes for any message.
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NATO Phonetic Alphabet
Convert text to the NATO phonetic alphabet. Spell out words clearly: Alpha, Bravo, Charlie...
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Number to Words Converter
Convert numbers to their English word equivalent. Supports numbers up to billions.
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Readability Score Calculator
Calculate the readability of your text using Flesch-Kincaid, Gunning Fog, and other metrics.
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Reading Time Calculator
Estimate how long it takes to read your text. Based on average reading speeds for different content ...
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Reading Time Estimator
Estimate how long it takes to read a piece of text. Paste your content and see the result.
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Reading Time Estimator
Estimate how long it takes to read a text. Paste your content and see minutes needed.
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Sentence Counter
Count sentences, paragraphs, and calculate average sentence length. Analyze your writing structure.
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Special Characters
Browse and copy special characters, symbols, arrows, math symbols, and emoji. Click to copy.
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Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, and more.
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Text Diff Checker
Compare two texts side by side. Highlights additions, deletions, and changes between versions.
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Text Repeater
Repeat text multiple times with optional separator. Great for testing, filling, and pattern creation...
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Text Similarity Checker
Compare two texts for similarity percentage. Uses word overlap analysis to detect similar content.
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Text to Speech
Convert text to speech using your browser. Choose voice, speed, and pitch.
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URL Slug Generator
Convert text into URL-friendly slugs. Handles special characters, spaces, and accented characters.
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Word Count Goal Tracker
Set a word count target and type to reach it. Progress bar and live stats keep you motivated.
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Word Frequency Counter
Analyze the most frequently used words in your text. See word counts ranked by frequency.
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