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Convert Light-year to Astronomical Unit

1 light-year = 63,241.077 astronomical units (ly to AU).

Need to move between light-years and astronomical units? A light-year is larger than a astronomical unit — one light-year contains 63,241.1 astronomical units. One astronomical unit works out to 0.0000158125 light-years in the other direction. The converter above does this in real time, and the reference chart lists the values that come up most often.

63,241.077

1 ly = 63,241.077 AU

How to convert Light-years to Astronomical Units

Multiply the light-year value by 63,241.1 to get astronomical units.

Example: 10 light-years = 632,411 astronomical units.

Light-year to Astronomical Unit Conversion Chart

Light-yearsAstronomical Units
1 ly63,241.077 AU
2 ly126,482.15 AU
3 ly189,723.23 AU
5 ly316,205.39 AU
10 ly632,410.77 AU
20 ly1,264,821.5 AU
25 ly1,581,026.9 AU
50 ly3,162,053.9 AU
100 ly6,324,107.7 AU
1000 ly63,241,077 AU

Frequently Asked Questions

How many astronomical units are in a light-year?
There are 63,241.077 astronomical units in 1 light-year.
How do you convert light-years to astronomical units?
Multiply the light-year value by 63,241.1 to get astronomical units.
What is 5 light-years in astronomical units?
5 light-years equals 316,205.39 astronomical units.
What is 100 light-years in astronomical units?
100 light-years equals 6,324,107.7 astronomical units.
What is 1 astronomical unit in light-years?
1 astronomical unit equals 0.000015812507 light-years.
Is this light-year to astronomical unit converter free?
Yes. The converter is free, needs no sign-up, and runs entirely in your browser — the values you enter never leave your device.

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