**Line** (**ln**) is a unit of length equal to ^{1}⁄_{40} of an inch or 0.635 millimeters. Line is an obsolete unit of length in Britain and France, used until 1824 as a unit of ^{1}⁄_{12} of an inch. Line can be used as an alternative to millimeter to measure tiny things, such as small insects.

Line in this sense is not to be confused with homonym ligne, which is ^{1}⁄_{12} of an inch.

Unit | is equal to |
---|---|

1 millimeter | ≈1.5748 ln |

1 dex | 2.5 ln |

1 centimeter | ≈15.748 ln |

1 inch | 40 ln |

1 hand | 160 ln |

1 foot | 480 ln |

1 yard | 1440 ln |

1 meter | ≈1574.8 ln |

1 hite | 2640 ln |

1 fathom | 2880 ln |

1 storey | 4800 ln |

1 duse | 5760 ln |

1 rod | 7920 ln |

1 furlong | 316800 ln |

1 kilometer | 1 574 803 ln |

1 mile | 2 534 400 ln |