Everyday Tool
Unit Converter
Convert length, weight, temperature, speed, volume, time, area and data units. Fast, accurate conversions between metric and imperial. Free and instant.
How to use this unit converter
- 1
Pick a category (length, weight, temperature, speed, volume, data).
- 2
Select the from and to units.
- 3
Type a value — the conversion updates instantly, and a quick chart shows common values.
Frequently asked questions
▸How many cm in an inch?
One inch equals exactly 2.54 centimeters. This converter handles that and thousands of other conversions instantly.
▸How do I convert Celsius to Fahrenheit?
Multiply Celsius by 9/5 and add 32. For example 20°C is 68°F. The temperature tab converts both directions automatically.
▸Are the conversion factors accurate?
Yes. Length, volume and mass use exact SI definitions; temperature and speed use the standard formulas.