How to convert degrees Celsius to kelvins
To convert degrees Celsius (°C) to kelvins (K), add 273.15.
K = °C + 273.15
Example: 25 °C = 298.15 K.
You can also type 25 °C to K into the smart calculator, or mix units: 1 °C + 1 K.
Degrees Celsius to Kelvins conversion table
| Degrees Celsius | Kelvins |
|---|---|
| −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 |
| 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 |
| 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 |
| 250 °C | 523.15 K |
Converting kelvins back to degrees Celsius
Use the reverse formula. See the Kelvins to Degrees Celsius converter, or press the swap button above.
About the units
Degree Celsius (°C)
Water freezes at 0 °C and boils at 100 °C at sea level. A step of one degree equals one kelvin.
Kelvin (K)
The SI base unit of temperature. Zero kelvin is absolute zero; the step size matches the Celsius degree.
Temperature scales do not share a zero, so converting between them needs an offset as well as a factor. Water freezes at 0 °C, 32 °F and 273.15 K. A change of one degree Celsius equals a change of one kelvin and 1.8 degrees Fahrenheit.
Questions and answers
What is 0 °C in K?
0 °C is 273.15 K.
What is 100 °C in K?
100 °C is 373.15 K.
How do I convert degrees Celsius to kelvins?
To convert degrees Celsius to kelvins, add 273.15. The formula is K = °C + 273.15. For example, 25 °C = 298.15 K.
What is 25 °C in K?
25 degrees Celsius is 298.15 kelvins.
At what temperature are Celsius and Fahrenheit equal?
At −40. −40 °C and −40 °F are the same temperature.
Does this °C to K converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.