# Convert Rømer [ºRø] to...

Rømer | |
---|---|

Unit system | other |

Unit of | temperature |

Symbol | ºRø |

Unit conversions | |

0 ºRø in ... |
... is equal to ... |

SI units | 258.86 K |

Imperial/US unit(s) | 6.29 ºF |

Other(s) | -14.29 ºC |

**Rømer** is a temperature scale named after the Danish astronomer Ole Christensen Rømer, who proposed it in 1701. It is based on the freezing point of pure water being 7.5 degrees and the boiling point of water as 60 degrees.

**I want to convert:**
**using**

Conversion | |
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Kelvin [K] | |

Celsius [ºC] | |

Fahrenheit [ºF] | |

Rankine [ºR] | |

Réaumur [ºRé] | |

Delisle [ºDe] | |

Newton [ºN] | |

Rømer [ºRø] |

In this scale, the zero was initially set using freezing brine. The boiling point of water was defined as 60 degrees. **Rømer** then saw that the freezing point of pure water was roughly one eighth of the way (about 7.5 degrees) between these two points, so he redefined the lower fixed point to be the freezing point of water at precisely 7.5 degrees. This did not greatly change the scale but made it easier to calibrate by defining it by reference to pure water.

Thus the unit of this scale, a **Rømer** degree, is 100/52.5 = 40/21 of a Kelvin (or of a ºC degree).

This article uses material from the Wikipedia article "Rømer scale", which is released under the Creative Commons Attribution-Share-Alike License 3.0.