About °C to K
Kelvin is the SI temperature scale used in physics and chemistry. It starts at absolute zero (−273.15 °C) and has no degree sign.
Temperature scales have different zero points, so you cannot just multiply: use K = °C + 273.15. For example, 20 °C = 293.15 K.
Celsius: water freezes at 0 °C and boils at 100 °C at sea level. Kelvin: the SI scale starting at absolute zero; a change of 1 K equals 1 °C.
Celsius to Kelvin conversion table
Formula: K = °C + 273.15
| Celsius | Kelvin |
|---|---|
| -273.15 °C | 0 K |
| -196 °C | 77.15 K |
| -100 °C | 173.15 K |
| -40 °C | 233.15 K |
| 0 °C | 273.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 37 °C | 310.15 K |
| 100 °C | 373.15 K |
| 500 °C | 773.15 K |
| 1,000 °C | 1,273.15 K |
Values rounded to 6 significant figures.
How to do it
- 1
Type a value in Celsius in the converter above (it is preset to °C → K).
- 2
Read the result instantly; tap Swap units to convert the other way.
- 3
Use the table for common values or the formula K = °C + 273.15 to convert by hand.