Kelvin to Celsius Calculator
Convert any temperature from Kelvin to Celsius using the exact formula. Kelvin is the SI unit of temperature used in science. The offset between the two scales is exactly 273.15 degrees.
The Kelvin scale and Celsius scale have the same degree size. They're just offset by 273.15 degrees. That means a change of 1 K is exactly the same as a change of 1 degree Celsius.
Formula: Celsius = Kelvin - 273.15
Key Reference Points:
| Kelvin | Celsius | Fahrenheit | Event |
|---|---|---|---|
| 0 K | -273.15°C | -459.67°F | Absolute zero |
| 77 K | -196.15°C | -320.67°F | Liquid nitrogen boils |
| 194.65 K | -78.5°C | -109.3°F | Dry ice sublimates |
| 233.15 K | -40°C | -40°F | C/F scales intersect |
| 273.15 K | 0°C | 32°F | Water freezes |
| 310.15 K | 37°C | 98.6°F | Human body temp |
| 373.15 K | 100°C | 212°F | Water boils |
Why does Kelvin start at absolute zero? The Kelvin scale is an absolute thermodynamic scale. At 0 K, molecular motion reaches its theoretical minimum. There's no such thing as a negative Kelvin temperature in classical thermodynamics, which makes the scale especially useful for physics equations like the ideal gas law (PV = nRT).