# Foot-pound

Physical unit | |
---|---|

Unit name | foot-pound |

Unit symbol | |

Physical quantity (s) | energy |

Formula symbol | |

dimension | |

system | Anglo-American system of measurement |

In SI units | |

In CGS units | |

Derived from | Foot , pound |

Physical unit | |
---|---|

Unit name | Pound-foot |

Unit symbol | |

Physical quantity (s) | Torque |

Formula symbol | |

dimension | |

system | Anglo-American system of measurement |

In SI units | |

In CGS units | |

Derived from | Foot , pound |

The **foot-pound** or **foot-pound force** is a British and American unit of both energy and torque (there also **pound-foot** ). The unit symbol is **ft lb** or **ft lbf** , also **lbf ft** .

One foot-pound is exactly 1.355 817 948 331 400 4 J ( Joule ) and corresponds to the energy that has to be applied to lift a body with a mass of one pound by one foot against its weight :

550 foot-pounds per second correspond to one hp (about 745.7 watts).