Quick reference
- −273.15 °C = 0 K (absolute zero)
- 0 °C = 273.15 K (water freezing)
- 25 °C = 298.15 K (room temperature)
- 100 °C = 373.15 K (water boiling)
FAQ
Why is there no degree sign with K?
By SI convention Kelvin is written without "°" — just "K". The Kelvin scale is a thermodynamic absolute scale, not a "degrees from a reference" scale.