Celsius to Kelvin Converter
Convert Celsius to Kelvin instantly. Enter a temperature and get the exact Kelvin value, with the formula and a reference table.
How to convert Celsius to Kelvin
K = °C + 273.15
Celsius, Fahrenheit and Kelvin are three temperature scales with different zero points and step sizes, so converting between them means shifting and rescaling — not just multiplying. This tool applies the exact Celsius-to-Kelvin formula, so results are accurate to the decimal.
10 Celsius = 283.15 Kelvin. Multiply your Celsius figure by the factor above (or just type it into the box) to convert any amount.
Need the other direction? Kelvin to Celsius
Celsius to Kelvin table
| Celsius (°C) | Kelvin (K) |
|---|---|
| 1 | 274.15 |
| 2 | 275.15 |
| 3 | 276.15 |
| 5 | 278.15 |
| 10 | 283.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 50 | 323.15 |
| 100 | 373.15 |
| 250 | 523.15 |
| 500 | 773.15 |
| 1,000 | 1,273.15 |
Frequently asked questions
How do you convert Celsius to Kelvin?
Use the formula K = °C + 273.15. Type a value into the box above and the converted temperature appears instantly.
What is a common reference point?
Water freezes at 0°C / 32°F / 273.15 K and boils at 100°C / 212°F / 373.15 K at sea level — handy anchors to sanity-check any conversion.
Why isn't it a simple multiplication?
Because the scales don't share a zero. Fahrenheit's zero and Celsius's zero are different temperatures, so you shift as well as scale.