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Exact relationship and formula
Degrees Celsius = K − 273.15. Kelvin = °C + 273.15. The offset is exact.
Reverse mode applies the inverse relationship from the same exact definition.
Worked example
0 K = −273.15 °C; 273.15 K = 0 °C; 293.15 K = 20 °C.
Kelvin uses the symbol K without a degree sign. Physical temperature inputs below 0 K, or below −273.15 °C in reverse mode, are rejected as below absolute zero.
Common kelvin reference values
| Kelvin | Conversion |
|---|---|
| 0 K | -273.15 °C |
| 100 K | -173.15 °C |
| 273.15 K | 0 °C |
| 293.15 K | 20 °C |
| 310.15 K | 37 °C |
| 373.15 K | 100 °C |
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