The short answer
- K = °C + 273.15
- 0 °C = 273.15 K
- 100 °C = 373.15 K
Worked example25 °C = 298.15 K
UNIT CONVERSION
← Temperature converterDegrees Celsius to kelvins
To convert degrees Celsius to kelvins, use K = °C + 273.15.
What the units mean
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.
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.
Degrees Celsius to kelvins table
| Degrees celsius (°C) | Kelvins (K) |
|---|---|
| −273.15 | 0 |
| −200 | 73.15 |
| −100 | 173.15 |
| −50 | 223.15 |
| −40 | 233.15 |
| −20 | 253.15 |
| 0 | 273.15 |
| 10 | 283.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 30 | 303.15 |
| 37 | 310.15 |
| 50 | 323.15 |
| 100 | 373.15 |
| 200 | 473.15 |
| 500 | 773.15 |
| 1,000 | 1,273.15 |
Values are rounded to 7 significant figures.
Common questions
How do I convert degrees Celsius to kelvins?
Use K = °C + 273.15. For example, 25 °C = 298.15 K.
What is 25 °C in K?
25 °C is 298.15 K.
Is this conversion exact?
Yes. Both units have exact legal definitions, so the factor is exact. Values on this page are rounded to 7 significant figures.