Celsius to Kelvin
Convert celsius to kelvin instantly. The formula is K = °C + 273.15, and the reference table below covers the values people look up most.
1 °C equals
274.15 K
K = °C + 273.15
Formula
K = °C + 273.15
Kelvin uses the same degree size as Celsius but starts at absolute zero, −273.15 °C.
Celsius to Kelvin table
| Celsius | Kelvin |
|---|---|
| -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 |
| 100 °C | 373.15 K |
Frequently asked questions
How many kelvin are in a celsiu?
One celsiu equals 274.15 kelvin. Kelvin uses the same degree size as Celsius but starts at absolute zero, −273.15 °C.
What is the formula to convert celsius to kelvin?
K = °C + 273.15. Enter any value above and the result updates as you type, with no rounding until the final display.
How do I convert kelvin back to celsius?
Use the reverse conversion: divide instead of multiplying, or open the kelvin to celsius page for the same tool the other way round.
Is this celsius to kelvin conversion exact?
Yes. Temperature scales convert through a fixed formula with an offset, so the result is exact for any input.