# Convert BTU to...

BTU | |
---|---|

Unit system | metric |

Unit of | energy |

Symbol | BTU |

Unit conversions | |

1 BTU in ... |
... is equal to ... |

SI units | 1055.1 J |

Imperial/US unit(s) | 778.79 ft.lbf |

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

Metric | Conversion |
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MWh | |

kWh | |

Wh | |

MJ | |

kJ | |

J | |

Ws | |

erg | |

eV |

British/Imperial | Conversion |
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Quad | |

Therm | |

BTU | |

Foot-pound |

Other | Conversion |
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kcal | |

cal | |

Thermie |

The **British thermal unit** (Btu or BTU) is a traditional unit of heat; it is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.

It is part of the British Imperial system of units. Its counterpart in the metric (SI) system is the calorie, which is defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius.

Heat is now known to be equivalent to energy, for which the metric unit is the joule; one **BTU** is about 1055 joule.

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