The short answer
- °C = K − 273.15
- 0 K = −273.15 °C
- 100 K = −173.15 °C
Worked example300 K = 26.85 °C
To convert kelvins to degrees Celsius, use °C = K − 273.15.
Kelvin. The kelvin is the SI unit of temperature. 0 K is absolute zero, and a change of 1 K is the same size as a change of 1 °C.
Degree celsius. The Celsius scale puts the freezing point of water at 0 °C and its boiling point at sea level at 100 °C. 0 °C is 273.15 K.
| Kelvins (K) | Degrees celsius (°C) |
|---|---|
| 0 | −273.15 |
| 50 | −223.15 |
| 77 | −196.15 |
| 100 | −173.15 |
| 200 | −73.15 |
| 250 | −23.15 |
| 273.15 | 0 |
| 280 | 6.85 |
| 290 | 16.85 |
| 293.15 | 20 |
| 298.15 | 25 |
| 300 | 26.85 |
| 310 | 36.85 |
| 350 | 76.85 |
| 373.15 | 100 |
| 400 | 126.85 |
| 500 | 226.85 |
| 1,000 | 726.85 |
| 5,778 | 5,504.85 |
Values are rounded to 7 significant figures.
Use °C = K − 273.15. For example, 300 K = 26.85 °C.
300 K is 26.85 °C.
Yes. Both units have exact legal definitions, so the factor is exact. Values on this page are rounded to 7 significant figures.