Convert Celsius to Kelvin.
Input the value of celsius below to convert instantly to kelvin with standard conversions, definitions, and equations.
About converting celsius to kelvin
Celsius to Kelvin is the everyday-to-absolute conversion used in physics, chemistry, and engineering, where temperatures are measured from absolute zero rather than the freezing point of water.
Kelvin and Celsius degrees are exactly the same size, so the only change is the zero point: K = °C + 273.15. Absolute zero, the coldest possible temperature, is 0 K = −273.15 °C. Room temperature of 25 °C is 298.15 K, and water boils at 373.15 K.
Because the two scales share a degree size, a temperature difference of 1 °C equals a difference of 1 K — which is why scientific formulas often use kelvin and celsius interchangeably for changes in temperature, even though their absolute values differ by 273.15.
- Just add 273.15 — no multiplication is involved.
- Kelvin is written without a degree symbol: 300 K, not 300 °K.
How to Convert Celsius to Kelvin
To convert celsius to kelvin, we use the official conversion formulas. Below is the mathematical formula, plain-English explanation, and a worked example.
Celsius (°C)
The standard metric temperature scale, where water freezes at 0°C and boils at 100°C.
Kelvin (K)
The SI unit of thermodynamic temperature, starting at absolute zero (0 K = -273.15°C).
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 |
| 15 °C | 288.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
| 250 °C | 523.15 K |
| 500 °C | 773.15 K |
| 1000 °C | 1273.15 K |
Kelvin to Celsius Conversion Table
| Kelvin (K) | Celsius (°C) |
|---|---|
| 1 K | -272.15 °C |
| 2 K | -271.15 °C |
| 3 K | -270.15 °C |
| 5 K | -268.15 °C |
| 10 K | -263.15 °C |
| 15 K | -258.15 °C |
| 20 K | -253.15 °C |
| 25 K | -248.15 °C |
| 50 K | -223.15 °C |
| 100 K | -173.15 °C |
| 250 K | -23.15 °C |
| 500 K | 226.85 °C |
| 1000 K | 726.85 °C |