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Light Year to Astronomical Unit

Convert Light Year (ly) to Astronomical Unit (au)

Please provide values below to convert Light Year (ly) to Astronomical Unit (au).
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      Updated on September 1, 2025

      About Light Year (ly) to Astronomical Unit (au) Conversion Calculator

      Written By
      author
      Nadiba Rahman
      Reviewed by
      author
      Mrinmoy Roy
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      You can use our Light Year (ly) to Astronomical Unit (au) conversion calculator as a reliable and efficient tool to simplify length conversions. It is designed for professionals, students, and anyone who needs a quick and accurate result. Conversion of Light Year (ly) to Astronomical Unit (au) is crucial in Length measurement related measurements. You can avoid the risk of manual calculation errors and save valuable time using our Light Year (ly) to Astronomical Unit (au) converter.

      Relation Between Light Year (ly) and Astronomical Unit (au)

      Let me explain to you about the relation between Light Year ly and Astronomical Unit (au) first before moving to the conversion process. Because it’s essential to grasp what these units represent.

      What is Light Year (ly)?

      A light year is the distance light travels in one year, approximately 9.461×1012 km. Light Year (ly) is a unit of length measurement which is commonly used in Length measurement. Used in astronomy to measure vast cosmic distances. Essential for describing distances between stars and galaxies. Highlights the speed of light in vacuum..

      What is Astronomical Unit (au)?

      Light Year (ly) is another unit of length measurement that is used in Astronomy. An astronomical unit (AU) is the average distance between the Earth and the Sun, approximately 149.6 million kilometers.. Used in astronomy to measure vast cosmic distances. Essential for describing distances between stars and galaxies. Highlights the speed of light in vacuum..

      How to Convert Astronomical Unit (au)?

      The conversion between Light Year (ly) and Astronomical Unit (au) follows a simple formula:

      Light Year = Light Year × 63241.07708426628

      Where, 63241.07708426628 is the value that allows you to convert between Light Year (ly) and Astronomical Unit (au).

      So,

      1 Astronomical Unit = 63241.07708426628 Light Year

      And, 1 Light Year = 1/63241.07708426628 Astronomical Unit
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      Examples of Converting Light Year (ly) to Astronomical Unit (au)

      To convert any value from Light Year (ly) to Astronomical Unit (au), simply multiply the amount of Light Year (ly) by the conversion factor:

      1 Astronomical Unit = 63241.07708426628 Light Year

      For example, if you want to convert 5 Light Year into Astronomical Unit and the conversion factor is 63241.07708426628, then:

      5 Light Year = 5 x 63241.07708426628 Astronomical Unit

      Light Year (ly) to Astronomical Unit (au) Conversion Chart

      Here’s a quick reference chart for common conversions between Light Year (ly) and Astronomical Unit (au)
      Light Year (ly)Astronomical Unit (au)
      1 Light Year (ly)63241.07708426628 Astronomical Unit (au)
      2 Light Year (ly)126482.15416853256 Astronomical Unit (au)
      3 Light Year (ly)189723.23125279884 Astronomical Unit (au)
      4 Light Year (ly)252964.30833706513 Astronomical Unit (au)
      5 Light Year (ly)316205.3854213314 Astronomical Unit (au)
      6 Light Year (ly)379446.4625055977 Astronomical Unit (au)
      7 Light Year (ly)442687.53958986397 Astronomical Unit (au)
      8 Light Year (ly)505928.61667413026 Astronomical Unit (au)
      9 Light Year (ly)569169.6937583965 Astronomical Unit (au)
      10 Light Year (ly)632410.7708426628 Astronomical Unit (au)
      You can use the above chart for quick and easy reference.

      How 1 Light Year (ly) Converts to Other length Units

      See the relation between Light Year (ly) and other length related measurement units:
      1 Light Year(ly)9.4607304725808e+25 Angstrom (Å)
      1 Light Year(ly)51083857843308.859375 Cables
      1 Light Year(ly)946073047258080000.000000 Centimeter (cm)
      1 Light Year(ly)94607304725808000.000000 Decimeter (dm)
      1 Light Year(ly)8277104525442520.000000 Ells (ells)
      1 Light Year(ly)8174071128309811200.000000 Ems (ems)
      1 Light Year(ly)5173190328401575.000000 Fathom
      1 Light Year(ly)31039141970409448.000000 Foot (ft)
      1 Light Year(ly)47029002985468.859375 Furlong
      1 Light Year(ly)93117425911228352.000000 Hand
      1 Light Year(ly)94607304725808000.000000 Hectometer (hm)
      1 Light Year(ly)372469703644913408.000000 Inch (in)
      1 Light Year(ly)9460730472580800.000000 Kilometer (km)
      1 Light Year(ly)9460730472580800.000000 Meter (m)
      1 Light Year(ly)9.4607304725808e+21 Micrometer (µm)
      1 Light Year(ly)372469703644913401856.000000 Mil (mil)
      1 Light Year(ly)5878625373183.607422 Mile (mi)
      1 Light Year(ly)9.4607304725808e+22 Millimeter (mm)
      1 Light Year(ly)9.4607304725808e+27 Nanometer (nm)
      1 Light Year(ly)0.306601 Parsec (pc)
      1 Light Year(ly)9.4607304725808e+30 Picometer (pm)
      1 Light Year(ly)372469703644913401856.000000 Thou
      1 Light Year(ly)10346380656803150.000000 Yard (yd)

      Features of Our Light Year (ly) to Astronomical Unit (au) Conversion Calculator

      Our Light Year ly to Astronomical Unit (au) converter is more than just a basic converter. Here's what makes it stand out:

      Output Precision Control

      You can control how precise your conversion results are. From settings, you can adjust decimal places from 0 to 12 places.

      Customizable Rounding Options

      You can control the output rounding options based on your necessity. You can turn the rounding mode on or off, and select between Ceiling or Floor rounding to match your needs.

      Multiple Number Formats

      Display your results the way you want:
      1. Standard format (e.g. 12.345245)
      2. Scientific notation (e.g. 1.23452e+1)
      3. Engineering format (e.g. 1.23452 × 10^1)

      Integrated Scientific Calculator

      We know you need to switch between a unit converter and a general calculator back and forth. To minimize your hassle, our Light Year ly to Astronomical Unit (au) converter comes up with an integrated scientific calculator.

      Conversion History Tracking

      You can always review your past length conversions and go to them whenever you like. It stores your most recent 10 unit conversions.

      Thousand Separators Toggle

      Our Light Year ly to Astronomical Unit (au) converter improves the output readability by toggling the thousand separators “On”. It’s useful when you work with large numbers.

      Conclusion

      Now, you understand how to convert Light Year ly to Astronomical Unit (au) manually. But you can bypass the manual calculation using our length conversion calculator. This allows you to get faster and accurate results in Astronomical Unit (au), which you can use in Length measurement related measurements. With the help of our integrated scientific calculator, calculation history tracking, and precision control, our Light Year ly to Astronomical Unit (au) converter is your swiss army knife for daily calculations.
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      Frequently Asked Questions [FAQs]