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Convert length, weight, temperature, area, volume and speed units.
The unit converter translates values between metric and imperial units for length, weight, area, volume, and speed. Type a value once, pick the two units you care about, and the result updates as you change either side.
Conversions use exact international definitions and run in your browser. Nothing is sent to a server, so you can price materials or check specs without leaving the page.
Kilometres to miles
Input
5 kmOutput
3.107 miOne mile is exactly 1.609344 kilometres.
Pounds to kilograms
Input
10 lbOutput
4.536 kgOne pound is exactly 0.45359237 kilograms.
Metres to feet
Input
2.5 mOutput
8.202 ftOne foot is exactly 0.3048 metres.
The exact international definitions: 1 inch is 2.54 centimetres, 1 pound is 0.45359237 kilograms, and 1 mile is 1.609344 kilometres. No approximations are involved.
Conversions are calculated in full precision and then rounded for display, usually to three or four decimals. The underlying value is not rounded before display.
Temperature has its own converter with the Celsius, Fahrenheit, and Kelvin formulas shown, since those scales do not share a simple ratio.
No. All conversion happens locally in your browser.
Converted to Centimeter (cm)
1 Millimeter (mm) = 0.1 Centimeter (cm)