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Unit Converter

Convert length, weight, temperature, area, volume, speed and fuel economy between metric, US and UK units.

How to use the unit converter

  1. Pick a type (length, weight, temperature, area, volume, speed or fuel economy).
  2. Enter the value, then choose the unit you are converting from and to.
  3. Press the swap button to reverse the conversion.

Handy conversions

FromToMultiply by
InchesCentimeters2.54
FeetMeters0.3048
MilesKilometers1.609344
PoundsKilograms0.45359237
US gallonsLiters3.785411784
Miles per hourKilometers per hour1.609344

Temperature uses formulas rather than a single factor: °F = °C × 9/5 + 32 and K = °C + 273.15. Fuel economy converts between miles per gallon (US and UK), kilometers per liter and liters per 100 km.

Gallons, pints and cups differ between the US and the UK, so each unit is labeled. The converter uses the US customary versions unless a row says UK.

Frequently asked questions

What is 1 mile in kilometers?

1 mile is exactly 1.609344 kilometers.

How do I convert Fahrenheit to Celsius?

Subtract 32 and multiply by 5/9. For example 68°F is 20°C.

Are US and UK gallons the same?

No. A US gallon is 3.785 liters and a UK (imperial) gallon is 4.546 liters.

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