Convert » Unit Converter » Length » Lightyear → Astronomical unit

Lightyear → Astronomical unit (ly → au)

ly to au direct conversion page with calculator, reverse conversion and comparison table.

1 ly = 63241.077084266 au
1 Lightyear (ly) = 63241.077084266 Astronomical unit (au).


swap converter

If you want to reverse convert, use Astronomical unit → Lightyear. 1 au = 1.5812507409821E-5 ly. You can also explore the full Length converter page for more cross conversions.

Conversion formula

Lightyear to Astronomical unit formula: value in au = value in ly × 63241.077084266.

Astronomical unit to Lightyear formula: value in ly = value in au × 1.5812507409821E-5.

How to convert Lightyear to Astronomical unit

To convert Lightyear to Astronomical unit, multiply the value in ly by 63241.077084266. This gives the result in au.

For example, 1 ly = 63241.077084266 au and 10 ly = 632410.77084266 au.

What is Lightyear?

Lightyear (ly): The distance light travels in vacuum during one Julian year. Despite its name, it measures distance rather than time and is used between stars. 1 ly = 9460730472580800 m.

What is Astronomical unit?

Astronomical unit (au): Used for distances within the Solar System. It represents the scale of the Earth–Sun distance but has an exact defined value, not the changing distance on a particular day. 1 au = 149597870700 m.

FAQ

How many astronomical unit are in 1 lightyear?

There are 63241.077084266 au in 1 ly.

Why can conversion results differ slightly?

Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.

How do I convert lightyear to astronomical unit?

Multiply the value in ly by 63241.077084266 to get the value in au.

Lightyear → other Length units

  • 1 lightyear = 9.4607304725808E+15 meter
  • 1 lightyear = 9460730472580.8 kilometer
  • 1 lightyear = 9.4607304725808E+16 decimeter
  • 1 lightyear = 9.4607304725808E+17 centimeter
  • 1 lightyear = 9.4607304725808E+18 millimeter
  • 1 lightyear = 9.4607304725808E+21 micrometer
  • 1 lightyear = 9.4607304725808E+24 nanometer
  • 1 lightyear = 9.4607304725808E+27 picometer
  • 1 lightyear = 5108385784330.9 nautical mile
  • 1 lightyear = 5878625373183.6 mile
  • 1 lightyear = 5.1731903284016E+15 fathom
  • 1 lightyear = 1.0346380656803E+16 yard
  • 1 lightyear = 3.1039141970409E+16 feet
  • 1 lightyear = 3.7246970364491E+17 inch
  • 1 lightyear = 9.3117425911228E+16 hand
  • 1 lightyear → astronomical unit = 63241.077084266 astronomical unit
  • 1 lightyear → parsec = 0.30660139378555 parsec

Lightyear → Astronomical unit Table

The table below shows common values from Lightyear to Astronomical unit and the reverse direction for quick reference.

lyauRounded
1 ly63241.077084266 au63241.0771
2 ly126482.15416853 au126482.1542
3 ly189723.2312528 au189723.2313
4 ly252964.30833707 au252964.3083
5 ly316205.38542133 au316205.3854
10 ly632410.77084266 au632410.7708
12 ly758892.9250112 au758892.9250
15 ly948616.15626399 au948616.1563
20 ly1264821.5416853 au1264821.5417
25 ly1581026.9271067 au1581026.9271
30 ly1897232.312528 au1897232.3125
40 ly2529643.0833707 au2529643.0834
50 ly3162053.8542133 au3162053.8542
75 ly4743080.78132 au4743080.7813
100 ly6324107.7084266 au6324107.7084
200 ly12648215.416853 au12648215.4169
250 ly15810269.271067 au15810269.2711
500 ly31620538.542133 au31620538.5421
750 ly47430807.8132 au47430807.8132
1000 ly63241077.084266 au63241077.0843
2500 ly158102692.71067 au158102692.7107
5000 ly316205385.42133 au316205385.4213
10000 ly632410770.84266 au632410770.8427

Astronomical unit → Lightyear Table

aulyRounded
1 au1.5812507409821E-5 ly0.0000
2 au3.1625014819641E-5 ly0.0000
3 au4.7437522229462E-5 ly0.0000
4 au6.3250029639283E-5 ly0.0001
5 au7.9062537049103E-5 ly0.0001
10 au0.00015812507409821 ly0.0002
12 au0.00018975008891785 ly0.0002
15 au0.00023718761114731 ly0.0002
20 au0.00031625014819641 ly0.0003
25 au0.00039531268524552 ly0.0004
30 au0.00047437522229462 ly0.0005
40 au0.00063250029639283 ly0.0006
50 au0.00079062537049103 ly0.0008
75 au0.0011859380557365 ly0.0012
100 au0.0015812507409821 ly0.0016
200 au0.0031625014819641 ly0.0032
250 au0.0039531268524552 ly0.0040
500 au0.0079062537049103 ly0.0079
750 au0.011859380557365 ly0.0119
1000 au0.015812507409821 ly0.0158
2500 au0.039531268524552 ly0.0395
5000 au0.079062537049103 ly0.0791
10000 au0.15812507409821 ly0.1581

Astronomical unit → Lightyear

The reverse value is 1 au = 1.5812507409821E-5 ly.