Which categories are supported?

Length, weight/mass, temperature, area, volume, speed, time and digital storage.

Are the conversions accurate?

Yes — they use standard conversion factors, and temperature uses the exact Celsius/Fahrenheit/Kelvin formulas.

No. All conversions run in your browser instantly — nothing is sent to a server.

Convert length, weight, temperature, area, volume, speed, time and digital storage between units — instantly, in your browser.

From

0.1

1 Millimetre = 0.1 Centimetre

Processed 100% in your browser — nothing you enter here is ever uploaded.

cm to inches, kg to pounds, °C to °F — the conversions you look up most often.

Convert between metric and imperial units for maths, physics and chemistry problems.

Convert digital storage (MB, GB) and speeds (km/h, mph) in a couple of clicks.

Pick a category — length, weight, temperature, area, volume, speed, time or digital storage.

Choose the unit to convert from and the unit to convert to.

Type a value and the result appears instantly. Use the swap button to reverse the conversion.

Everything is calculated in your browser — nothing is uploaded.