To convert Kelvin to Celsius, use °C = K − 273.15. For example, 300 K equals 26.85 °C. Enter any value above and the result appears instantly — free and entirely in your browser, with nothing uploaded.
How do you convert Kelvin to Celsius?
The conversion formula is °C = K − 273.15. The two scales have different zero points and step sizes, so you shift as well as scale.
Kelvin to Celsius conversion table
| K | °C |
|---|---|
| 0 K | -273.15 °C |
| 10 K | -263.15 °C |
| 20 K | -253.15 °C |
| 37 K | -236.15 °C |
| 100 K | -173.15 °C |
What is Kelvin (K)?
The kelvin (K) is the SI base unit of temperature. It starts at absolute zero (0 K = −273.15 °C), the point where molecular motion stops, and is used throughout science.
What is Celsius (°C)?
Degrees Celsius (°C) is the everyday metric temperature scale: water freezes at 0 °C and boils at 100 °C at sea level. It is used almost everywhere except the United States.
Why convert Kelvin to Celsius?
Celsius is standard in most of the world, Fahrenheit dominates in the United States, and kelvin is the scientific scale. Recipes, weather and travel constantly require switching between them.
By international definition, water freezes at 0 °C (32 °F, 273.15 K) and boils at 100 °C (212 °F) at standard atmospheric pressure (NIST). Normal human body temperature is about 37 °C (98.6 °F).
How to convert Kelvin to Celsius
- Enter the value in Kelvin into the left field of the converter.
- Read the result in Celsius instantly in the right field — it updates automatically.
- Use the swap button to reverse the direction (Celsius to Kelvin).
The converter runs entirely in your browser: no uploads, no queue, no limits. You can even use it offline.