Unit Conversion Calculators

36 free, accurate conversion tools for the measurements people use every day — length, weight, temperature, volume, area, speed, pressure, power and fuel economy. Every result uses exact, internationally accepted constants.

Length & Distance

Mile to Kilometer Kilometer to Mile Foot to Meter Meter to Foot Inch to Centimeter Centimeter to Inch Yard to Meter Inch to Millimeter

Mass & Weight

Pound to Kilogram Kilogram to Pound Ounce to Gram Gram to Ounce Stone to Kilogram

Temperature

Fahrenheit to Celsius Celsius to Fahrenheit Celsius to Kelvin Kelvin to Celsius

Volume

U.S. Gallon to Liter Liter to U.S. Gallon U.S. Cup to Milliliter U.S. Quart to Liter U.S. Pint to Milliliter

Area

Square Foot to Square Meter Square Meter to Square Foot Acre to Square Meter Square Foot to Acre

Speed

Miles per Hour to Kilometers per Hour Kilometers per Hour to Miles per Hour Knot to Miles per Hour

Pressure

Pounds per Square Inch to Bar Bar to Pounds per Square Inch Pounds per Square Inch to Kilopascal

Power

Mechanical Horsepower to Kilowatt Kilowatt to Mechanical Horsepower

Fuel Economy

MPG (U.S.) to Liters per 100 km Liters per 100 km to MPG (U.S.)

Looking for a different pair? The full unit converter covers all 15 measurement categories.

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