Convert Celsius to Kelvins
30 °C = 303.15 K
K = °C + 273.15Convert Celsius to kelvins instantly — type in either box and it works both ways.
How to convert Celsius to kelvins
To convert degrees Celsius to kelvins, add 273.15 to the Celsius temperature.
K = °C + 273.15
Example: convert 30 °C to K
- 30 + 273.15 = 303.15
- 30 °C = 303.15 K
Celsius to Kelvins conversion chart
| Degrees Celsius (°C) | Kelvins (K) |
|---|---|
| -40 °C | 233.15 K |
| -20 °C | 253.15 K |
| -10 °C | 263.15 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 |
| 40 °C | 313.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
| 150 °C | 423.15 K |
| 180 °C | 453.15 K |
| 200 °C | 473.15 K |
Frequently asked questions
How do you convert Celsius to kelvins?
To convert degrees Celsius to kelvins, add 273.15 to the Celsius temperature. The formula is K = °C + 273.15.
How many kelvins are in one Celsius?
1 °C = 274.15 K.
How do I convert kelvins back to degrees Celsius?
Use the reverse formula: °C = K − 273.15. For example 1 K = -272.15 °C.
At what temperature are Celsius and Fahrenheit equal?
−40 °C is exactly −40 °F. It is the only temperature where both scales show the same number.
Is this converter free and accurate?
Yes. It is free, uses exact internationally defined conversion factors, and runs in your browser — nothing you type is sent anywhere.
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