Unit Converter
Convert length, weight, temperature, and speed
About unit conversion
Why do US and metric units differ?
The US uses the imperial system inherited from British standards, while most of the world uses the metric system (SI units) adopted for its decimal simplicity.
How is temperature converted?
Celsius to Fahrenheit: multiply by 9/5 then add 32. Celsius to Kelvin: add 273.15. Kelvin is the absolute temperature scale used in science.