Celsius to Kelvin
Convert degrees Celsius (°C) to kelvins (K). Type in either box; the other updates as you go.
Example25 °C = 298.15 K
FormulaK = °C + 273.15
How to convert degrees Celsius to kelvins
Add 273.15 to the Celsius temperature.
K = °C + 273.15
Example
Convert 25 degrees Celsius to kelvins:
25 °C = 298.15 K
Degree Celsius to kelvin conversion chart
| Degrees Celsius (°C) | Kelvins (K) |
|---|---|
| -40 °C | 233.15 K |
| -30 °C | 243.15 K |
| -20 °C | 253.15 K |
| -10 °C | 263.15 K |
| -5 °C | 268.15 K |
| 0 °C | 273.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 15 °C | 288.15 K |
| 18 °C | 291.15 K |
| 20 °C | 293.15 K |
| 22 °C | 295.15 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 |
| 50 °C | 323.15 K |
| 60 °C | 333.15 K |
| 70 °C | 343.15 K |
| 80 °C | 353.15 K |
| 90 °C | 363.15 K |
| 100 °C | 373.15 K |
| 150 °C | 423.15 K |
| 180 °C | 453.15 K |
| 200 °C | 473.15 K |
| 220 °C | 493.15 K |
| 250 °C | 523.15 K |
Going the other way? See the kelvins to degrees Celsius chart.
About the units
Degree Celsius (°C)
On the Celsius scale water freezes at 0 °C and boils at 100 °C at sea level. Almost every country uses it for weather and cooking.
Kelvin (K)
The kelvin is the SI unit of temperature. It starts at absolute zero, so 0 K is −273.15 °C, and one kelvin is the same size as one degree Celsius.
Frequently asked questions
What is 25 degrees Celsius in kelvins?
25 degrees Celsius is 298.15 kelvins.
How do you convert degrees Celsius to kelvins?
Add 273.15 to the Celsius temperature.
Convert between Celsius, Fahrenheit, Kelvin and Rankine. Open the temperature converter to see a value in every unit at once.