Convert Celsius to Kelvin
Celsius (°C) to Kelvin (K) — the formula, a worked example and a live converter, all in your browser.
Celsius to Kelvin formula
Temperature scales don't share a zero point, so the conversion uses an offset formula rather than a simple ratio:
K = °C + 273.15
Worked example
20 °C = 20 = 293.15 K.
Celsius to Kelvin conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| -40 | 233.15 |
| 0 | 273.15 |
| 20 | 293.15 |
| 37 | 310.15 |
| 100 | 373.15 |
Common uses
Common in physics and chemistry, where everyday Celsius readings must be expressed on the absolute Kelvin scale.
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Frequently asked questions
What is the formula to convert celsius to kelvin?
Use K = °C + 273.15.
What is 20°C in kelvin?
20°C equals 293.15K.
Is this converter accurate?
Yes. It uses the exact internationally-defined conversion factors and runs entirely in your browser, so results match standards tables and nothing you type is uploaded.