Convert degrees Celsius to kelvins
Enter a temperature in degrees Celsius to get kelvins. Formula: K = °C + 273.15.
How to use the Degree Celsius to kelvin
- Type the number of degrees Celsius.
- Click Convert.
- Read the result in kelvins, plus the same value in every other temperature unit.
°C to K formula
K = °C + 273.15
Worked example
25 °C → 25 + 273.15 = 298.15 K.
Degrees Celsius to kelvins conversion table
| Degrees Celsius | Kelvins |
|---|---|
| -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 |
About the degree Celsius
Water freezes at 0 °C and boils at 100 °C at sea level. The everyday scale almost everywhere except the USA.
About the kelvin
The SI unit; 0 K is absolute zero and one kelvin equals one degree Celsius in size. Used in science and for colour temperature of light.
Related conversions
kelvins to degrees Celsius · degrees Celsius to degrees Fahrenheit · any unit.
Frequently asked questions
How many kelvins in a degree Celsius?
Use K = °C + 273.15.
How many degrees Celsius in a kelvin?
Use the inverse: °C = K − 273.15.
Is the factor exact?
Yes, the formulas are exact by definition.
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Last updated 2026-09-23.