273.15 kelvin to Celsius
0.00 °C
273.15 K = 0.00 °C.
Celsius
0.00°C
273.15 K = 0.00 °C
In short
How many Celsius is 273.15 kelvin?
273.15 K = 0.00 °C. 1 kelvin = 1.000000 Celsius, then − 273.15, so the working is 273.15 × 1.000000 − 273.1500 = 0.00.
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 kelvin = 1.000000 Celsius, then − 273.15 273.15 × 1.000000 − 273.1500 = 0.00
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 (°C) | Off by |
|---|---|---|
| Whole number | 0 | exact |
| 1 decimal | 0.0 | exact |
| 2 decimals | 0.00 | exact |
Round trip: take 0.00 °C back the other way and you land on 273.1500 K — a drift of 0.0000 K. That gap is the rounding, not the conversion.
What 273.15 K looks like
273.15 K
Water freezes here at standard atmospheric pressure, and this is the exact point the Celsius scale calls zero by definition.
Frequently asked questions
What is 273.15 kelvin in Celsius?
273.15 kelvin is 0.00 Celsius. 1 kelvin = 1.000000 Celsius, then − 273.15, so the working is 273.15 × 1.000000 − 273.1500 = 0.00.
How accurate is 0.00 °C?
Rounding to 0.00 °C and converting straight back gives 273.1500 K, a drift of 0.0000 K from the 273.15 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
Kelvin to Celsius Converter
Convert kelvin to Celsius — lab readings, physics homework, and colour temperature.
Open the kelvin to celsius converter →