100 Celsius to kelvin
373.15 K
100 °C = 373.15 K.
kelvin
373.15K
100 °C = 373.15 K
In short
How many kelvin is 100 Celsius?
100 °C = 373.15 K. 1 Celsius = 1.000000 kelvin, then + 273.15, so the working is 100 × 1.000000 + 273.1500 = 373.15.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 Celsius = 1.000000 kelvin, then + 273.15 100 × 1.000000 + 273.1500 = 373.15
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (K) | Off by |
|---|---|---|
| Whole number | 373 | −0.15000 |
| 1 decimal | 373.1 | −0.05000 |
| 2 decimals | 373.15 | exact |
Round trip: take 373.15 K back the other way and you land on 100.0000 °C — a drift of 0.0000 °C. That gap is the rounding, not the conversion.
What 100 °C looks like
100 °C
Water boils at standard atmospheric pressure, 373.15 kelvin, the upper fixed point the original centigrade scale was built on.
Frequently asked questions
What is 100 Celsius in kelvin?
100 Celsius is 373.15 kelvin. 1 Celsius = 1.000000 kelvin, then + 273.15, so the working is 100 × 1.000000 + 273.1500 = 373.15.
How accurate is 373.15 K?
Rounding to 373.15 K and converting straight back gives 100.0000 °C, a drift of 0.0000 °C from the 100 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
Celsius to Kelvin Converter
Convert Celsius to kelvin — gas-law problems, absolute temperature, and lab work.
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