Celsius to Kelvin
Free instant celsius to kelvin converter. K = °C + 273.15.
Common Celsius to Kelvin values
| Celsius (°C) | Kelvin (K) |
|---|---|
| -40 | 233.15 |
| 0 | 273.15 |
| 10 | 283.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 37 | 310.15 |
| 100 | 373.15 |
| 1000 | 1273.15 |
How does Celsius to Kelvin conversion work?
Type a value in the Celsius (°C) field and the equivalent in Kelvin (K) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Celsius. The metric temperature unit. 0 °C is the freezing point of water; 100 °C is the boiling point at sea level.
Kelvin. The SI base unit for temperature, used in science. 0 K is absolute zero (−273.15 °C). No degree symbol — just "K".
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Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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