How to use the Celsius to Kelvin Converter
- Type the number of Celsius in the box
- The value in Kelvin appears instantly
- Use the table for common values, or switch units to convert anything else
Celsius to Kelvin formula
K = °C + 273.15
Example: 0 °C × the formula = 273.15 K.
💡 Kelvin has no degree sign—write 300 K, not 300 °K.
Celsius to Kelvin conversion chart
| Celsius | Kelvin |
|---|---|
| -273.15 °C | 0 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 |
| 200 °C | 473.15 K |
| 500 °C | 773.15 K |
| 1,000 °C | 1,273.15 K |
Frequently asked questions
How do I convert Celsius to Kelvin?
Use the formula K = °C + 273.15. For example, 0 °C = 273.15 K.
What is 1 °C in Kelvin?
1 °C = 274.15 K.
Any handy reference points?
Kelvin has no degree sign—write 300 K, not 300 °K.
Is this Celsius to Kelvin converter accurate?
Yes. It uses exact definitions (for example, 1 inch = 2.54 cm and 1 lb = 0.45359237 kg) and shows up to 10 significant digits.
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