All unit converters

Ten converters covering everyday and technical units. Each one works instantly in your browser and explains the units it uses.

Length converter

Millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.

Milligrams, grams, kilograms, metric tons, ounces, pounds and stone.

Celsius, Fahrenheit and Kelvin.

Square millimeters to square kilometers, square feet, acres and hectares.

Milliliters, liters, cubic meters, cups, fluid ounces, pints, quarts and gallons.

Meters per second, kilometers per hour, miles per hour and knots.

Milliseconds, seconds, minutes, hours, days and weeks.

Bits, bytes, decimal kB–PB and binary KiB–PiB.

Joules, kilojoules, calories, kilocalories, watt-hours and kilowatt-hours.

Watts, kilowatts, mechanical horsepower and metric horsepower.