Conversion

Celsius to Kelvin Converter

Convert Celsius to Kelvin instantly with a simple, free calculator.

The result is the same temperature on the Kelvin scale, where 0 K is absolute zero, so a larger number means a warmer temperature.

Formula

Kelvin = Celsius + 273.15. Add 273.15 to the Celsius value.

How it works

Enter a Celsius temperature. The calculator adds 273.15, the offset between the Celsius zero point and absolute zero. A result of 0 K would mean absolute zero, reached only at −273.15 °C.

Worked example

For example, 20 °C gives 20 + 273.15 = 293.15 K.

FAQs

What is 0 °C in Kelvin?
0 °C equals 273.15 K.

Can Kelvin be negative?
No. Zero kelvin is absolute zero, the lowest possible temperature.

Do Kelvin degrees use the ° symbol?
No. The unit is written as K, not °K, by modern convention.

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