Enter a value and pick its unit — Celsius, Fahrenheit, and Kelvin all update instantly below.
Celsius and Fahrenheit are offset scales, not simple multiples of each other — 0°C (freezing point of water) equals 32°F, and the two scales only meet at exactly −40°. Kelvin is the same scale as Celsius, just shifted so that 0K is absolute zero, the coldest possible temperature.