Celsius to Kelvin Converter
Used in physics, chemistry and engineering, where formulas need absolute temperatures.
0 °C = 273.15 K
kelvins
How to convert degrees Celsius to kelvins
Add 273.15 to the Celsius temperature.
Formula
K = °C + 273.15
Examples
- 0 °C → 0 + 273.15 = 273.15 K
- 25 °C → 25 + 273.15 = 298.15 K
- 100 °C → 100 + 273.15 = 373.15 K
Degrees Celsius to kelvins conversion table
| Degrees Celsius (°C) | Kelvins (K) |
|---|---|
| −273.15 | 0 |
| −200 | 73.15 |
| −100 | 173.15 |
| −50 | 223.15 |
| −20 | 253.15 |
| 0 | 273.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 37 | 310.15 |
| 50 | 323.15 |
| 100 | 373.15 |
| 200 | 473.15 |
| 500 | 773.15 |
| 1,000 | 1,273.15 |
Values rounded to 4 decimal places or 4 significant digits.
About degrees Celsius
On the Celsius scale water freezes at 0 °C and boils at about 100 °C at sea-level pressure. Today it is formally defined from the kelvin (°C = K − 273.15). It is the scale used for weather and cooking in almost every country.
About kelvins
The kelvin is the SI base unit of temperature. Its scale starts at absolute zero, so there are no negative kelvin values, and a change of 1 K equals a change of 1 °C. It is written without a degree sign.
Frequently asked questions
What is the formula to convert Celsius to Kelvin?
K = °C + 273.15. Add 273.15 to the Celsius temperature.
What is 0 °C in Kelvin?
0 °C is 273.15 K.
What is 25 °C in Kelvin?
25 °C is 298.15 K.