Temperature
Kelvin is the SI absolute temperature scale with zero at absolute zero. Celsius shares the same step size but starts at water's freeze point offset.
Kelvin is the SI absolute temperature scale with zero at absolute zero. Celsius shares the same step size but starts at water's freeze point offset.
Add 273.15 to Celsius to obtain Kelvin for physics equations.
Celsius in, Kelvin out—not Kelvin to Celsius (see k-to-c).
Enter Celsius. Calculate to view Kelvin.
This celsius to kelvin converter - free online applies the standard relationship below. Intermediate values are kept at full precision; only the displayed result is rounded.
K = C + 273.15
298.15 K.
Defined offset between Celsius and thermodynamic Kelvin scale.
Yes.
Convert F to C first or use full temperature converter.
The factors and formulas used by this tool follow these references:
Last reviewed: October 2026. Found an error? Tell us and we will correct it.
Tap any value for the exact answer and the step-by-step math.
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