Unit Converter
Convert common units quickly and clearly.
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How to use the Unit Converter
Choose a measurement category, enter the value you have, then select the source and destination units. UsefulFox converts between metric and imperial measurements instantly.
Metric and imperial conversions
Common conversions include centimetres to inches, kilograms to pounds, miles to kilometres and litres to gallons. Select the units you actually have rather than relying on a rough mental conversion.
Common conversion facts
One inch is exactly 2.54 centimetres. One foot is 30.48 centimetres. One mile is 1.609344 kilometres. One pound is 0.45359237 kilograms.
Celsius and Fahrenheit
Temperature uses a formula because the scales have different zero points. Celsius to Fahrenheit is °F = (°C × 9/5) + 32; Fahrenheit to Celsius is °C = (°F − 32) × 5/9.
UK and US gallons are different
An Imperial UK gallon and a US gallon are not the same size. Choose the correct gallon type for recipes, fuel and other volume conversions.
Frequently asked questions
1How do I convert metric and imperial units?
Select a category, choose the two units, enter your value and read the converted result.
2How many centimetres are in an inch?
One inch is exactly 2.54 centimetres.
3How many pounds are in a kilogram?
One kilogram is approximately 2.20462 pounds.
4How do I convert Celsius to Fahrenheit?
Multiply Celsius by 9/5 and add 32. For example, 20°C equals 68°F.
5Are UK and US gallons the same?
No. An Imperial UK gallon is larger than a US gallon.