How to convert Kelvin to Celsius
- Take the value in Kelvin.
- Use the formula °C = K − 273.15.
- For example, 273.15 K is 0 °C.
About Kelvin and Celsius
To convert Kelvin to Celsius, subtract 273.15. 300 K is 26.85 °C and 0 K, absolute zero, is −273.15 °C.
Kelvin values turn up in physics homework, lab reports, astronomy and cryogenics. Light bulbs also carry Kelvin ratings like 2700 K or 6500 K, but those describe the color of the light, not how hot the bulb gets.
Examples
- 273.15 K (the freezing point of water) is 0 °C
- 77 K (liquid nitrogen) is −196.15 °C
- 5,772 K (the surface of the Sun) is 5,498.85 °C
- 2.73 K (the cosmic microwave background) is −270.42 °C
Kelvin to Celsius chart
| Kelvin (K) | Celsius (°C) |
|---|---|
| 0 | −273.15 |
| 1 | −272.15 |
| 2.73 | −270.42 |
| 4.2 | −268.95 |
| 10 | −263.15 |
| 20 | −253.15 |
| 50 | −223.15 |
| 77 | −196.15 |
| 100 | −173.15 |
| 150 | −123.15 |
| 173.15 | −100 |
| 200 | −73.15 |
| 233.15 | −40 |
| 250 | −23.15 |
| Kelvin (K) | Celsius (°C) |
|---|---|
| 253.15 | −20 |
| 263.15 | −10 |
| 273.15 | 0 |
| 283.15 | 10 |
| 293.15 | 20 |
| 298.15 | 25 |
| 300 | 26.85 |
| 310.15 | 37 |
| 323.15 | 50 |
| 373.15 | 100 |
| 400 | 126.85 |
| 500 | 226.85 |
| 1,000 | 726.85 |
| 5,772 | 5,498.85 |