Free Converters
Translate measurements across length, weight, temperature, area, volume, speed, storage, energy and pressure. Choose named units, enter a value and read the result immediately.
Choose from all converters
Unit Converter
Convert length, mass, temperature, area, volume, and speed.
Open tool →Length Converter
Convert centimeters to inches, meters to feet, or miles to kilometers with instant answers.
Open tool →Weight Converter
Change kilograms, pounds, grams, ounces, and stone into the mass units you need.
Open tool →Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin with automatic answers and absolute-zero checks.
Open tool →Area Converter
Compare square meters, square feet, acres, hectares, and other surface measurements.
Open tool →Volume Converter
Convert liters, milliliters, cups, and clearly labeled US or Imperial liquid measures.
Open tool →Speed Converter
Change mph to km/h, meters per second, feet per second, or knots as you type.
Open tool →Data Storage Converter
Convert bits and bytes using clearly labeled decimal KB/MB/GB and binary KiB/MiB/GiB units.
Open tool →Energy Converter
Convert joules, calories, kilocalories, watt-hours, kilowatt-hours, and International Table BTU.
Open tool →Pressure Converter
Convert pascals, bar, atmospheres, psi, Torr, and conventional mmHg with clear unit choices.
Open tool →Check the unit convention before converting
An inch is 2.54 centimeters and a pound is 453.59237 grams. US and Imperial gallons differ. Storage uses KB for 1,000 bytes and KiB for 1,024 bytes. Temperature conversion includes an offset, unlike a simple length ratio.
Before you start
Results use fixed unit definitions and floating-point arithmetic. Extra displayed digits do not improve the precision of your original measurement. Currency conversion is excluded because exchange rates require changing external data.