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Celsius to Kelvin
Type a value in either box. Formula: K = °C + 273.15.
How to convert Celsius to Kelvin
Use this formula:
K = °C + 273.15
Example: 25 °C = 298.15 K.
Good to know
Kelvin has no negative values and no degree sign: 0 K is absolute zero. A change of 1 °C equals a change of 1 K, so you only add 273.15.
Celsius to Kelvin chart
| Celsius (°C) | Kelvin (K) |
|---|---|
| -40 °C | 233.15 K |
| -30 °C | 243.15 K |
| -20 °C | 253.15 K |
| -10 °C | 263.15 K |
| -5 °C | 268.15 K |
| 0 °C | 273.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 15 °C | 288.15 K |
| 18 °C | 291.15 K |
| 20 °C | 293.15 K |
| 21 °C | 294.15 K |
| 22 °C | 295.15 K |
| 25 °C | 298.15 K |
| 30 °C | 303.15 K |
| 35 °C | 308.15 K |
| 37 °C | 310.15 K |
| 40 °C | 313.15 K |
| 50 °C | 323.15 K |
| 60 °C | 333.15 K |
| 80 °C | 353.15 K |
| 100 °C | 373.15 K |
| 150 °C | 423.15 K |
| 180 °C | 453.15 K |
| 200 °C | 473.15 K |
| 220 °C | 493.15 K |
| 250 °C | 523.15 K |
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