To convert **mm to ly** enter the value in the field below and select the target unit, the value will be displayed below:

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Metric | |
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Kilometer (km) | ^{} |

Meter (m) | ^{} |

Decimeter (dm) | ^{} |

Centimeter (cm) | ^{} |

Millimeter (mm) | ^{} |

Micrometer (µm) | ^{} |

Nanometer (nm) | ^{} |

Angstrom (Å) | ^{} |

Astronomical | |
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Parsec (pc) | ^{} |

Light-year | ^{} |

Astronomical unit (AU) | ^{} |

Light-minute | ^{} |

Light-second | ^{} |

British/American | |
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League | ^{} |

Mile (mi) | ^{} |

Furlong | ^{} |

Chain | ^{} |

Rod (rd) | ^{} |

Yard (yd) | ^{} |

Foot (ft) | ^{} |

Link | ^{} |

Hand | ^{} |

Inch (in) | ^{} |

Line | ^{} |

Thousandth (mil) | ^{} |

Thou (thou) | ^{} |

Nautical | |
---|---|

Nautical mile | ^{} |

Fathom | ^{} |

The formulas for conversion are represented below:

ly = mm / 9,461x10^{18}

Example: 30 Millimeters in Light Years:

ly = mm / 9,461x10^{18}

ly = 30 / 9,461x10^{18}

ly = 3,171x10^{-18}

mm = ly * 9,461x10^{18}

Example: 1.5 Light Years in Millimeters:

mm = ly * 9,461x10^{18}

mm = 1.5 * 9.461x10^{18}

mm = 1.419x10^{19}

Considering that 1 Millimeter equals 0.001 Light Years, you can use a rule of three to get that **100 Millimeters equal 0.1 Light Years**.

1 mm - 1,057x10^{-19} ly

100 mm - x

Apply the rule of three and get:

x ~~mm~~ = 100 * 1.057x10^{-19} ly~~mm~~

x = 1.057x10^{-17} ly

If every 1 Light Years we have 9.461x10^{18} Millimeters, just multiply the amount of Light Years (100) by 9.461x10^{18}, so you will get that **100 ly equals 9.461x10 ^{20} mm**. Observe the calculation below:

mm = ly * 9,461x10^{18}

mm = 100 * 9,461x10^{18}

mm = 9.461x10^{20}