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Kelvin temperature conversion formulas
Conversion from to Formula
Kelvins degrees Celsius °C = K - 273.15
degrees Celsius Kelvins K = °C + 273.15
Kelvins degrees Fahrenheit °F = K × 1.8 − 459.67
degrees Fahrenheit Kelvins K = (°F + 459.67) / 1.8
Kelvins electronvolts K / 11,604.5 = eV
electronvolts Kelvins eV × 11,604.5 = K
Note that for temperature intervals rather than temperature readings,
1 K = 1 °C and 1 K = 1.8 °F
Comparisons among various temperature scales
Conversion calculator for units of temperature

The kelvin (symbol: K) is the SI (Système International d'Unités) unit of temperature and is one of the seven SI base units. The kelvin is a unit measure of temperature on the thermodynamic (absolute) temperature scale.

## Key Temperatures

Some key temperatures relating kelvin values to other scales are shown in the below table.

Point Kelvin Celsius Fahrenheit
Absolute zero

(precisely by definition)

0 K –273.15 °C −459.67 °F
Water's freezing point 273.15 K 0 °C 32 °F
Water’s triple point

(precisely by definition)

273.16 K 0.01 °C 32.018 °F
Water’s boiling point1 373.1339 K 99.9839 °C 211.9710 °F

1 For Vienna Standard Mean Ocean Water at one standard atmosphere (101.325 kPa) when calibrated solely per the two-point definition of thermodynamic temperature.