Astronomical Unit to Light Year Converter

Quick Answer

1 AU = 1.5813e-5 ly

Formula: Light Year = Astronomical Unit x 1.5813e-5

Formula verifiedLive calculation

From (Astronomical Unit)AU

To (Light Year)

1.5813e-5ly

Astronomical Unit to Light Year Conversion Table

Astronomical Unit (AU)	Light Year (ly)	Formula Step
1	1.5813e-5	1 x 1.5813e-5
2	3.1625e-5	2 x 1.5813e-5
3	4.7438e-5	3 x 1.5813e-5
4	6.3250e-5	4 x 1.5813e-5
5	7.9063e-5	5 x 1.5813e-5
6	9.4875e-5	6 x 1.5813e-5
7	0.000110688	7 x 1.5813e-5
8	0.0001265	8 x 1.5813e-5
9	0.000142313	9 x 1.5813e-5
10	0.000158125	10 x 1.5813e-5

Convert Astronomical Unit to Other Astronomy Units

Astronomical Unit to Solar Radius Astronomical Unit to Solar Mass Astronomical Unit to Parsec Astronomical Unit to Light Year

Frequently Asked Questions

How do you convert Astronomical Unit to Light Year?

Use the formula Light Year = Astronomical Unit x 1.5813e-5. For example: 1 AU = 1.5813e-5 ly. Our calculator handles this automatically.

How many Light Years in a Astronomical Unit?

1 AU = 1.5813e-5 ly.

Why would I need to convert Astronomical Unit to Light Year?

Converting Astronomical Unit to Light Year is useful for scientific calculations, engineering projects, international trade, and everyday measurements where different unit systems are used.

Astronomy reference calculator

Reference factors

1.5813e-5

ly per AU

63241.1

AU per ly

Formula audit

Light Year = Astronomical Unit x 1.5813e-5

1 AU = 1.5813e-5 ly

Results use the shared conversion engine and retain the full conversion rule before display formatting.

Unit reference

CategoryAstronomy

Input unitAstronomical Unit (AU)

Output unitLight Year (ly)