You probably don't have a thermometer that has Kelvin, Celsius, and Fahrenheit all listed, and even if you did, it wouldn't be helpful outside of its temperature range. What do you do when you need to convert between temperature units? You can look them up on this handy chart or you can do the math using simple weather conversion equations.

## Temperature Unit Conversion Formulas

There's no complicated math required to convert one temperature unit to another. Simple addition and subtraction will get you through conversions between the Kelvin and Celsius temperature scales. Fahrenheit involves a bit of multiplication, but it's nothing you can't handle. Just plug in the value you know to get the answer in the desired temperature scale using the appropriate conversion formula:

**Kelvin to Celsius**: C = K - 273 (C = K - 273.15 if you want to be more precise)

**Kelvin to Fahrenheit**: F = 9/5(K - 273) + 32 or F = 1.8(K - 273) + 32

**Celsius to Fahrenheit**: F = 9/5(C) + 32 or F = 1.80(C) + 32

**Celsius to Kelvin**: K = C + 273 (or K = C + 271.15 to be more precise)

**Fahrenheit to Celsius**: C = (F - 32)/1.80

**Fahrenheit to Kelvin**: K = 5/9(F - 32) + 273.15

Remember to report Celsius and Fahrenheit values in degrees. There is no degree using the Kelvin scale.

## Temperature Conversion Table

Kelvin |
Fahrenheit |
Celsius |
Significant Values |

373 | 212 | 100 | Boiling point of water at sea level |

363 | 194 | 90 | |

353 | 176 | 80 | |

343 | 158 | 70 | |

333 | 140 | 60 | 56.7°C or 134.1°F is the hottest temperature recorded on Earth at Death Valley, California on July 10, 1913 |

323 | 122 | 50 | |

313 | 104 | 40 | |

303 | 86 | 30 | |

293 | 68 | 20 | Typical room temperature |

283 | 50 | 10 | |

273 | 32 | 0 | Freezing point of water into ice at sea level |

263 | 14 | -10 | |

253 | -4 | -20 | |

243 | -22 | -30 | |

233 | -40 | -40 | Temperature where Fahrenheit and Celsius are equal |

223 | -58 | -50 | |

213 | -76 | -60 | |

203 | -94 | -70 | |

193 | -112 | -80 | |

183 | -130 | -90 | -89°C or -129°F is the coldest temperature recorded on Earth at Vostok, Antarctica, July 1932 |

173 | -148 | -100 | |

0 | -459.67 | -273.15 | absolute zero |

**References**

Ahrens (1994) Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign

World: Highest Temperature, World Meteorological Organization, Arizona State University, retrieved March 25, 2016.

World: Lowest Temperature, World Meteorological Organization, ASU, retrieved March 25, 2016.