Converters
Fast, accurate unit converters for length, weight, temperature, speed, area, volume, data, time and more. Switch between metric and imperial in real time — handy for travel, cooking, school and work. Everything is computed locally in your browser.
Length Converter
Convert between metric and imperial length units instantly.
Temperature Converter
Convert Celsius, Fahrenheit and Kelvin in real time.
Weight Converter
Convert between kilograms, pounds, ounces, grams and more.
Speed Converter
Convert km/h, mph, m/s, knots and feet per second.
Area Converter
Convert square meters, acres, hectares, square feet and more.
Volume Converter
Convert liters, milliliters, gallons, cups and fluid ounces.
Data Storage Converter
Convert bits, bytes, KB, MB, GB and TB.
Time Converter
Convert seconds, minutes, hours, days, weeks and years.
Pressure Converter
Convert pascals, bar, psi, atmospheres and mmHg.
Energy Converter
Convert joules, calories, kilocalories, watt-hours and BTU.
Angle Converter
Convert degrees, radians, gradians and turns.
Roman Numeral Converter
Convert a number (1–3999) into Roman numerals.
Height Converter (cm to feet)
Convert a height in centimeters to feet and inches.
Frequency Converter
Convert hertz, kilohertz, megahertz and gigahertz.
Force Converter
Convert newtons, kilonewtons, kilogram-force, pound-force and dynes.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal.
Fuel Economy Converter
Convert between L/100km, km/L, MPG (US) and MPG (UK).
Bandwidth Converter
Convert data rates: bps, Kbps, Mbps, Gbps and Tbps.
Color Converter (HEX, RGB, HSL)
Convert a HEX color to RGB and HSL instantly.
Cooking Measurement Converter
Convert teaspoons, tablespoons, cups, fluid ounces and milliliters.
Roman Numeral to Number
Decode a Roman numeral into a regular number.
PX to REM Converter
Convert pixels to rem (and back) for responsive CSS.
Torque Converter
Convert newton-metres, pound-feet and kilogram-force metres.
Oven Temperature (Gas Mark ↔ °C ↔ °F)
Convert oven temperatures between gas mark, Celsius and Fahrenheit.
Color Contrast Checker (WCAG)
Check the contrast ratio between two colors against WCAG.