Free Online Calculators
Celsius → Kelvin
K = °C + 273.15. Example: 20 °C = 293.15 K, and 0 °C = 273.15 K.
Reverse: Kelvin to Celsius Converter
Science formulas such as the ideal gas law need temperatures in kelvins. Adding a fixed offset to the Celsius value gives the absolute temperature.
| °C | K |
|---|---|
| -273.15 °C | 0 K |
| -200 °C | 73.15 K |
| -100 °C | 173.15 K |
| -40 °C | 233.15 K |
| -20 °C | 253.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 30 °C | 303.15 K |
| 37 °C | 310.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
| 200 °C | 473.15 K |
| 500 °C | 773.15 K |
| 1,000 °C | 1,273.15 K |
Calculated with the same formula as the converter, rounded to six significant digits.
Use the formula K = °C + 273.15. Example: 100 °C = 373.15 K.
-273.15 °C = 0 K.
1,000 °C = 1,273.15 K.