Temperature
Convert degree Celsius (°C) to kelvin (K). Temperature scales are affine, not just scaled — converting requires an offset as well as a factor, which is why °C and °F don't share a zero.
1 °C = 274.15 K
To convert degree Celsius to kelvin, apply K = °C + 273.15.
| °C | K |
|---|---|
| 1 | 274.15 |
| 2 | 275.15 |
| 5 | 278.15 |
| 10 | 283.15 |
| 25 | 298.15 |
| 50 | 323.15 |
| 100 | 373.15 |
| 250 | 523.15 |
| 500 | 773.15 |
| 1000 | 1273.15 |
Process temperatures are read in °C or °F; thermodynamic calculations use absolute K or °R.
A temperature difference is not the same as an absolute temperature: a 10 °C rise equals an 18 °F rise, but 10 °C does not equal 50 °F.
Worked example. A temperature of 150 °C is 423.15 K.
Use K = °C + 273.15. Temperature scales are affine, so the conversion needs both a multiplier and an offset — unlike a simple unit factor.
1 °C equals 274.15 K. Note that a temperature difference converts differently from an absolute temperature.
Process temperatures are read in °C or °F; thermodynamic calculations use absolute K or °R.