Kelvin to Celsius Converter
Convert Kelvin to Celsius instantly, and Celsius back to Kelvin. Based on the exact 0 K = -273.15 °C offset.
Independently verified for accuracy
Calculator by Toolsloft ↗- Result
- -272.15 Celsius (°C)
- Conversion
- 1 Kelvin (K) = -272.15 Celsius (°C)
Convert Kelvin to Celsius, and Celsius back to Kelvin with the swap button. Handy for physics and chemistry work where absolute temperature is quoted in Kelvin. Enter the temperature and the answer updates as you type.
How this is calculated
Kelvin and Celsius share the same degree size, so the two differ only by an offset of 273.15. Celsius equals Kelvin minus 273.15, and Kelvin equals Celsius plus 273.15. Kelvin below zero is rejected because absolute zero, 0 K, is the coldest possible temperature.
How to use
- Enter the temperature in Kelvin.
- Keep the direction on Kelvin to Celsius, or press Swap units for Celsius to Kelvin.
- Read the result in degrees Celsius.
Examples
- Room temperature:
300 K = 26.85 °C - Water boils:
373.15 K = 100 °C - Absolute zero:
0 K = -273.15 °C
FAQ
- How do I convert Kelvin to Celsius?
- Subtract 273.15 from the Kelvin value. So 300 K is 26.85 °C.
- Why can Kelvin not go below zero?
- Zero Kelvin is absolute zero, the lowest temperature possible, so a negative Kelvin value has no physical meaning.