Kelvin to Celsius – convert K to °C
Convert Kelvin to Celsius (K to °C) for physics, chemistry, engineering and classroom work. This page opens the main temperature converter with K → °C pre-selected to turn absolute temperatures into everyday Celsius values.
Open the interactive K → °C converter:
Use main converter (K → °C) or switch to °C → KOn the homepage you can also convert to Fahrenheit and Rankine, or use the Tool Hub to keep a Pomodoro timer running while you revise.
Quick reference: K to °C
The exact relationship is: °C = K − 273.15.
| Kelvin (K) | Celsius (°C) |
|---|---|
| 0 K | -273.15 °C (absolute zero) |
| 273.15 K | 0 °C |
| 293.15 K | 20 °C |
| 298.15 K | 25 °C |
| 310.15 K | 37 °C (body temperature) |
| 373.15 K | 100 °C (boiling water) |
How to convert K to °C
Use this formula:
Celsius = Kelvin − 273.15
Examples:
- 290 K − 273.15 = 16.85 °C
- 500 K − 273.15 = 226.85 °C
- 77 K − 273.15 = -196.15 °C (liquid nitrogen region)
Why convert Kelvin to Celsius?
- Interpreting scientific data logged in Kelvin.
- Converting ideal gas law calculations back into everyday Celsius values.
- Understanding cryogenic or high-temperature processes in more familiar units.
- Classroom and exam questions that start in Kelvin but want answers in °C.
Related temperature converters on this site
Behind the scenes, the converter already uses Kelvin as the base temperature, so going from K to °C (or °F, or Rankine) is always consistent.