Celsius to Kelvin Converter
Type a value in celsius to get it in kelvin, and see the reverse conversion.
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Celsius to Kelvin Converter by TheCalcTools
How the Celsius to Kelvin Converter works
The kelvin scale starts at absolute zero (−273.15 °C) and uses the same size of degree as Celsius, so you add 273.15. Kelvin is used in physics, chemistry and colour temperature.
To convert celsius to kelvin, add 273.15. The calculator shows the result to 6 significant figures; the conversion factor itself is exact by definition.
Quick estimate in your head: add 273.
The formula
Worked example
Using the default values shown in the calculator:
| Value in celsius (°C) | 25 |
|---|
- 25 °C + 273.15 = 298.15 K.
Result:
| Kelvin (K) | 298.15 |
|---|---|
| 1 °C in K | 274.15 |
| Your number read as K, in °C | -248.15 |
Conversion table
| °C | K |
|---|---|
| -273.15 °C | 0 K |
| -196 °C | 77.15 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 |
| 1,000 °C | 1,273.15 K |
Frequently asked questions
What is 1 degree Celsius in kelvin?
1 degree Celsius (°C) equals 274.15 K.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.