How to convert units?
Our free online unit converter supports the most commonly used measurement systems worldwide: the metric system (meters, kilograms, liters, Celsius) used by most countries, and the imperial system (feet, pounds, gallons, Fahrenheit) used primarily in the United States, United Kingdom, and a few other countries.
Supported unit categories
- Length — meters, kilometers, centimeters, inches, feet, yards, miles, nautical miles, nanometers, micrometers
- Weight — kilograms, grams, milligrams, metric tons, pounds, ounces, stones, carats
- Temperature — Celsius, Fahrenheit, Kelvin, Rankine
- Volume — liters, milliliters, cubic meters, gallons (US/UK), quarts, pints, cups, fluid ounces
- Area — square meters, square kilometers, hectares, acres, square feet, square miles
- Speed — km/h, m/s, mph, knots, ft/s
- Digital Storage — bytes, kilobytes, megabytes, gigabytes, terabytes, petabytes
- Energy — joules, calories, kilowatt-hours, BTU, electronvolts
- Pressure — pascals, bars, psi, atmospheres, torr
Most common conversions
- 1 inch = 2.54 centimeters
- 1 foot = 30.48 centimeters
- 1 mile = 1.60934 kilometers
- 1 pound = 0.453592 kilograms
- 1 gallon (US) = 3.78541 liters
- 1 acre = 4046.86 square meters