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Unit Converter

Pick a type, enter a value and choose the units.

Type LengthWeight / massVolume (US)Temperature

Value From To

How it works

Values convert through a base unit (metre, kilogram, litre) using exact international definitions, e.g. 1 inch = 2.54 cm, 1 lb = 0.45359237 kg, US gallon = 3.785411784 L. Temperature uses the standard formulas. Results show up to 6 decimals.

FAQ

How many centimetres are in an inch?

Exactly 2.54 cm, by international definition.

How do I convert Fahrenheit to Celsius?

Subtract 32, then multiply by 5/9. 212°F is 100°C.

Are US and UK gallons the same?

No. This tool uses the US gallon (3.785411784 litres). The UK imperial gallon is about 4.546 litres and is not included.

How many pounds are in a stone?

14 pounds, or about 6.35 kg.

Is my data uploaded?

No. Everything is calculated in your browser and nothing is stored.

Tell us what to fix

Free tool, provided as is, with no guarantee. Check important figures independently. Please do not enter personal information in feedback.