Kelvin to Celsius
Free instant kelvin to celsius converter. °C = K − 273.15.
Common Kelvin to Celsius values
| Kelvin (K) | Celsius (°C) |
|---|---|
| 0 | -273.15 |
| 100 | -173.15 |
| 200 | -73.15 |
| 273.15 | 0 |
| 300 | 26.85 |
| 373.15 | 100 |
| 500 | 226.85 |
| 1000 | 726.85 |
How does Kelvin to Celsius conversion work?
Type a value in the Kelvin (K) field and the equivalent in Celsius (°C) 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.
Kelvin. The SI base unit for temperature, used in science. 0 K is absolute zero (−273.15 °C). No degree symbol — just "K".
Celsius. The metric temperature unit. 0 °C is the freezing point of water; 100 °C is the boiling point at sea level.
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🎯 Accurate conversions
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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