Convert degrees Celsius to kelvin in your browser, with a full reference table and the formula behind it. Free, instant, no sign-up.
How to convert degrees Celsius to kelvin
K = °C + 273.15
Kelvin uses the same degree size as Celsius, so this is a straight shift with no multiplication. Zero kelvin is absolute zero, which is why the scale has no negative numbers. The converter above is already set to degrees Celsius and kelvin, so you can type any value and read the answer straight away.
Celsius to Kelvin conversion table
Common values, worked out in advance:
| Degrees celsius (°C) | Kelvin (K) |
|---|---|
| 0 °C | 273.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 15 °C | 288.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 30 °C | 303.15 K |
| 35 °C | 308.15 K |
| 37 °C | 310.15 K |
| 40 °C | 313.15 K |
| 100 °C | 373.15 K |
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Frequently asked questions
How many kelvin are in 1 °C?
One °C is 274.15 K. The table above covers the values people look up most often.
What is the formula to convert degrees Celsius to kelvin?
K = °C + 273.15. Kelvin uses the same degree size as Celsius, so this is a straight shift with no multiplication. Zero kelvin is absolute zero, which is why the scale has no negative numbers.
Is this celsius to kelvin converter accurate?
Yes. It uses the exact internationally defined conversion factors and calculates in your browser, so nothing is rounded until the result is displayed.
Can I convert kelvin back to degrees Celsius here?
Yes. Use the swap button in the converter to reverse the direction, or pick any other pair of units from the two dropdowns.