To convert **km 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 | |
---|---|

Kilometer (km) | ^{} |

Meter (m) | ^{} |

Decimeter (dm) | ^{} |

Centimeter (cm) | ^{} |

Millimeter (mm) | ^{} |

Micrometer (µm) | ^{} |

Nanometer (nm) | ^{} |

Angstrom (Å) | ^{} |

Astronomical | |
---|---|

Parsec (pc) | ^{} |

Light-year | ^{} |

Astronomical unit (AU) | ^{} |

Light-minute | ^{} |

Light-second | ^{} |

British/American | |
---|---|

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 = km / 9,461x10^{12}

Example: 1000 kilometers in Light Year:

ly = km / 9,461x10^{12}

ly = 1000 / 9,461x10^{12}

ly = 1,057x10^{-10}

km = ly * 9,461x10^{12}

Example: 3 Light Years in kilometers:

km = ly * 9,461x10^{12}

km = 3 * 9,461x10^{12}

km = 2,838x10^{13}

Considering that 1 kilometer is equivalent to 1.057000834x10^{-13} light-years, you can use a rule of three to obtain that **1000000 km equals 1.057000834x10 ^{- 7} light years**.

1 km - 1,057000834x10^{-13}ly

1000000 km - x

Apply the rule of three and get:

x ~~km~~ = 1,057000834x10^{-7} ~~km~~ly

x = 1,057000834x10^{-7} ly

If every 9,461x10^{12} kilometer we have 1 light year, just multiply the number of light years (100) by 9,461x10^{12}, so you will get that **100 light years equals 9,461x10 ^{14} km**. Observe the calculation below:

km = ly * 9,461x10^{12}

Km = 100 * 9,461x10^{12}

km = 9,461x10^{14}