How to convert Celsius to Kelvin
K = °C + 273.15. Example: 25 °C + 273.15 = 298.15 K.
Celsius to Kelvin conversion table
| Celsius (c) | Kelvin (k) |
|---|---|
| -40 | 233.15 |
| -20 | 253.15 |
| -10 | 263.15 |
| 0 | 273.15 |
| 10 | 283.15 |
| 15 | 288.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 30 | 303.15 |
| 35 | 308.15 |
| 37 | 310.15 |
| 40 | 313.15 |
| 50 | 323.15 |
| 100 | 373.15 |
About the units
Celsius (c) — the metric temperature scale where water freezes at 0 °C and boils at 100 °C at sea level.
Kelvin (k) — the SI temperature unit starting at absolute zero (−273.15 °C), used in science.
Frequently asked questions
What is the formula for Celsius to Kelvin?
K = °C + 273.15. Example: 25 °C + 273.15 = 298.15 K.
Is there a quick way to estimate it in my head?
Add 273 to the Celsius value for a quick estimate.
Is this converter accurate?
Yes. It uses the internationally defined conversion factors (for example, 1 inch = 2.54 cm exactly and 1 pound = 0.45359237 kg exactly) and shows up to 10 significant digits.
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