Free Length Converter

Astronomical Unit to light-year.

One astronomical unit equals 0.0000158125074098 light-year. Use this converter for quick, accurate au to ly conversions.

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Precision

Conversion formula.

1 au = 0.0000158125074098 ly

To convert astronomical unit to light-year, multiply the value in au by 0.0000158125074098.

Quick examples

1 au = 0.0000158125074098 ly
5 au = 0.0000790625370491 ly
10 au = 0.000158125074098 ly
100 au = 0.00158125074098 ly

Astronomical Unit to Light-year conversion table.

Astronomical Unit (au)	Light-year (ly)
1	0.0000158125074098
2	0.0000316250148196
3	0.0000474375222295
4	0.0000632500296393
5	0.0000790625370491
6	0.0000948750444589
7	0.000110687551869
8	0.000126500059279
9	0.000142312566688
10	0.000158125074098
11	0.000173937581508
12	0.000189750088918
13	0.000205562596328
14	0.000221375103737
15	0.000237187611147
16	0.000253000118557
17	0.000268812625967
18	0.000284625133377
19	0.000300437640787
20	0.000316250148196

Convert the other way: Light-year to Astronomical Unit

Related conversions.

Millimeter to Light-year Millimeter to Astronomical Unit Centimeter to Light-year Centimeter to Astronomical Unit Decimeter to Light-year Decimeter to Astronomical Unit

More Astronomical Unit conversions.

au → mm au → cm au → dm au → m au → km au → μm au → nm au → in

Frequently asked questions.

How many light-year are in a astronomical unit?

One astronomical unit equals 0.0000158125074098 light-year (ly).

How do I convert au to ly?

Multiply the value in au by 0.0000158125074098. For example, 10 au = 0.000158125074098 ly.

Is this conversion exact?

Yes. This converter uses the internationally defined factor: 1 au = 0.0000158125074098 ly.