How to convert degrees Celsius to kelvins
Formula: K = °C + 273.15. Worked example: 20 °C = 293.15 K.
About these units
The kelvin is the SI unit; the scale starts at absolute zero (0 K = −273.15 °C) and one kelvin equals one Celsius degree, so the conversion is a plain addition: K = °C + 273.15. Light colour temperatures such as 2700 K or 6500 K use the same unit.
Category: temperature. Results on this page are calculated in your browser and rounded to 7 significant digits; the table above uses 6. For other units of temperature open the full unit converter, or use the reverse page — kelvins to degrees celsius.