Celsius to Kelvin
Convert celsius (°C) to kelvin (K) instantly — with formula and reference table.
°C
K
Quick answer: 1 °C = 274.15 K. To convert celsius to kelvin, apply °C × 1 + 273.15.
Converting celsius to kelvin
This converter changes a value in celsius (°C) into kelvin (K). One celsiu equals 274.15 K. The Kelvin scale starts at absolute zero. To convert Celsius to Kelvin, add 273.15. The size of one degree is identical on both scales. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
K = °C × 1 + 273.15
Example
Convert 25 °C to K: 25 × 1 + 273.15 = 298.15 K.
Celsius to Kelvin conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| 1 °C | 274.15 K |
| 2 °C | 275.15 K |
| 3 °C | 276.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
How to use this converter
- Enter a value in the celsius (°C) field.
- Read the converted value in kelvin (K) below.
- Type into the K field instead to convert in reverse, or use the swap button.
Frequently asked questions
How do I convert Celsius to Kelvin?
Add 273.15 to the Celsius value. K = C + 273.15.
What is 0 Celsius in Kelvin?
0 Celsius equals 273.15 Kelvin, the freezing point of water.
What is absolute zero in Celsius?
Absolute zero (0 K) equals -273.15 Celsius.