Kelvin to Celsius Converter
Convert Kelvin to Celsius quickly. Free online temperature converter with common conversions and formula.
Formula
°C = K - 273.15
Common Conversions
How to Convert Kelvin to Celsius
Subtract 273.15 from kelvin. Formula: °C = K - 273.15. So 300 K - 273.15 = 26.85 °C. The kelvin and Celsius scales use the same degree size; they differ only by the offset (Celsius zero is water freezing, Kelvin zero is absolute zero).
Used when interpreting scientific measurements (which often quote kelvin) for everyday context. A scientific paper might describe a process at 350 K - that's 76.85 °C, well above body temperature but below boiling. Astronomy and physics commonly use kelvin; everyday weather and cooking use Celsius.
Common Kelvin to Celsius Conversions
| Kelvin | Celsius |
|---|---|
| 0 K (abs zero) | -273.15 °C |
| 100 K | -173.15 °C |
| 200 K | -73.15 °C |
| 273.15 K | 0 °C (freezing) |
| 293.15 K | 20 °C (room temp) |
| 310 K | 36.85 °C (body) |
| 373.15 K | 100 °C (boiling) |
| 1000 K | 726.85 °C |
Frequently Asked Questions
Why include the .15?
The 0.15 in 273.15 K = 0 °C reflects the precise definition of the triple point of water (273.16 K) used to define both scales. For everyday use, 273 K is a fine approximation.
What's the temperature of space?
Approximately 2.7 K (2.7 K above absolute zero) - the cosmic microwave background temperature. That's -270.45 °C. 'Space' isn't actually empty enough to have a single temperature, but the radiation flowing through it has this characteristic temperature.
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