Kelvin to Celsius Converter
°C = K − 273.15
Written without a degree sign: 300 K, not 300 °K.
1 kelvin equals -272.15 degrees Celsius
How to convert Kelvin to Celsius
These formulas convert temperature readings. For a temperature difference, use only the scale factor: do not add or subtract the zero-point offset.
°C = K − 273.15The two scales use degrees of the same size, so converting is only a shift of the zero point by 273.15.
-253.15 °C = 20 − 273.15Written without a degree sign: 300 K, not 300 °K.
Kelvin to Celsius conversion table
Common values in kelvins, converted to degrees Celsius.
| Kelvins (K) | Degrees Celsius (°C) |
|---|---|
| 0 | -273.15 |
| 10 | -263.15 |
| 20 | -253.15 |
| 25 | -248.15 |
| 30 | -243.15 |
| 37 | -236.15 |
| 50 | -223.15 |
| 100 | -173.15 |
Frequently asked questions
Is a change of 1 K the same as a change of 1 °C?
Yes. A change of 1 K is a change of 1 °C. Their degree sizes are equal; their zero points differ.
About these units
kelvinK
The SI base unit of thermodynamic temperature. Its zero is absolute zero, so kelvin values are never negative.
Reference: BIPM SI Brochure (9th ed.).
degree Celsius°C
Water freezes at 0 °C and boils at 100 °C at standard atmospheric pressure. The everyday scale in most of the world.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.