Kelvin to Celsius Converter (K to °C)
Convert any Kelvin value to Celsius instantly. Kelvin is written as K, not °K. The exact formula is °C = K − 273.15. This Kelvin to C calculator also converts K to C for decimal values.
273.15 K is equal to 0°C. Calculation: 273.15 − 273.15 = 0°C.
How to Convert Kelvin to Celsius
Subtract 273.15 from the Kelvin value. Kelvin and Celsius have the same interval size, but their zero points are different.
Worked example
Popular Kelvin to Celsius Conversions
Choose a value to load it into the calculator.
Kelvin to Celsius Conversion Table
A curated reference table for frequently used Kelvin values.
| Kelvin (K) | Celsius (°C) | Context |
|---|---|---|
| 0 K | −273.15°C | Absolute zero |
| 25 K | −248.15°C | — |
| 77.15 K | −196°C | — |
| 100 K | −173.15°C | — |
| 233.15 K | −40°C | — |
| 253.15 K | −20°C | — |
| 273.15 K | 0°C | Celsius zero point |
| 283.15 K | 10°C | — |
| 293.15 K | 20°C | — |
| 298.15 K | 25°C | — |
| 300 K | 26.85°C | — |
| 310.15 K | 37°C | — |
| 323.15 K | 50°C | — |
| 373.15 K | 100°C | Celsius 100 point |
| 473.15 K | 200°C | — |
0 Kelvin in Celsius
0 K equals −273.15°C. This point is called absolute zero, the lowest possible temperature. Kelvin does not use negative values because its scale begins at absolute zero. Celsius can represent temperatures below 0°C.
Celsius and Kelvin Explained
Kelvin is the SI base unit of temperature. Celsius, also called centigrade, and Kelvin have equal-size intervals, so a 1 K change equals a 1°C change. Their zero points are different: 0 K equals −273.15°C. Write the Kelvin unit as K, not °K.
Kelvin to Celsius FAQs
°C = K − 273.15. Subtract 273.15 from the
Kelvin value to get Celsius.
Need the Reverse Conversion?
For the opposite direction, use the dedicated Celsius to Kelvin converter.