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Convert Astronomical Units (AU) to Light Years (ly)

Result
Swap units (ly → AU)

Quick reference for converting Astronomical Units to Light Years

Formula
ly = AU ÷ 63,241.1
Quick rough maths
To get the Light Years, divide the Astronomical Units by 63,000.
Astronomical Units (AU) in 1 Light Year
There are 63,241.1 Astronomical Units in 1 Light Year
Light Years (ly) in 1 Astronomical Unit
There are 0.0000158125 Light Years in 1 Astronomical Unit

Conversion table: Astronomical Units (AU) to Light Years (ly)

0AU – 24AU
0AU0ly
1AU0.00001581250741ly
2AU0.00003162501482ly
3AU0.00004743752223ly
4AU0.00006325002964ly
5AU0.00007906253705ly
6AU0.00009487504446ly
7AU0.0001106875519ly
8AU0.0001265000593ly
9AU0.0001423125667ly
10AU0.0001581250741ly
11AU0.0001739375815ly
12AU0.0001897500889ly
13AU0.0002055625963ly
14AU0.0002213751037ly
15AU0.0002371876111ly
16AU0.0002530001186ly
17AU0.000268812626ly
18AU0.0002846251334ly
19AU0.0003004376408ly
20AU0.0003162501482ly
21AU0.0003320626556ly
22AU0.000347875163ly
23AU0.0003636876704ly
24AU0.0003795001778ly
25AU – 49AU
25AU0.0003953126852ly
26AU0.0004111251927ly
27AU0.0004269377001ly
28AU0.0004427502075ly
29AU0.0004585627149ly
30AU0.0004743752223ly
31AU0.0004901877297ly
32AU0.0005060002371ly
33AU0.0005218127445ly
34AU0.0005376252519ly
35AU0.0005534377593ly
36AU0.0005692502668ly
37AU0.0005850627742ly
38AU0.0006008752816ly
39AU0.000616687789ly
40AU0.0006325002964ly
41AU0.0006483128038ly
42AU0.0006641253112ly
43AU0.0006799378186ly
44AU0.000695750326ly
45AU0.0007115628334ly
46AU0.0007273753409ly
47AU0.0007431878483ly
48AU0.0007590003557ly
49AU0.0007748128631ly
50AU – 74AU
50AU0.0007906253705ly
51AU0.0008064378779ly
52AU0.0008222503853ly
53AU0.0008380628927ly
54AU0.0008538754001ly
55AU0.0008696879075ly
56AU0.0008855004149ly
57AU0.0009013129224ly
58AU0.0009171254298ly
59AU0.0009329379372ly
60AU0.0009487504446ly
61AU0.000964562952ly
62AU0.0009803754594ly
63AU0.0009961879668ly
64AU0.001012000474ly
65AU0.001027812982ly
66AU0.001043625489ly
67AU0.001059437996ly
68AU0.001075250504ly
69AU0.001091063011ly
70AU0.001106875519ly
71AU0.001122688026ly
72AU0.001138500534ly
73AU0.001154313041ly
74AU0.001170125548ly
75AU – 99AU
75AU0.001185938056ly
76AU0.001201750563ly
77AU0.001217563071ly
78AU0.001233375578ly
79AU0.001249188085ly
80AU0.001265000593ly
81AU0.0012808131ly
82AU0.001296625608ly
83AU0.001312438115ly
84AU0.001328250622ly
85AU0.00134406313ly
86AU0.001359875637ly
87AU0.001375688145ly
88AU0.001391500652ly
89AU0.001407313159ly
90AU0.001423125667ly
91AU0.001438938174ly
92AU0.001454750682ly
93AU0.001470563189ly
94AU0.001486375697ly
95AU0.001502188204ly
96AU0.001518000711ly
97AU0.001533813219ly
98AU0.001549625726ly
99AU0.001565438234ly

Unit information

Astronomical Unit
/astrəˈnɒmɪk(ə)l ˈjuːnɪt/
Symbol: AU
Unit system: Astronomical system of units

What is the Astronomical Unit?

The astronomical unit is a unit of length and is used in the Astronomical system of units and denoted by the symbol au.

It represents the average distance between the Earth and the Sun which is approximately 150 million kilometres (or 93 million miles).

It's used mostly to express distances within our Solar System.

Light Year
/lʌɪt jɪə,jəː/
Symbol: ly
Unit system: Astronomical System of Units

What is the Light Year?

The light year is a unit of length in the Astronomical system of units. It uses the symbol ly.

Often confused with a unit of time as it contains the word "year", it is actually defined by the International Astronomical Union (IAU) as the amount of distance that light travels in a vacuum in one Julian year (365.25 days).

Using the speed of light (299,792,458 m/s or 'c') and the Julian year (as apposed to the Gregorian year which is 365.2425 days), we can equivalate 1 light year as 9,460,730,472,580,800 metres or ≈ 9.46 trillion kilometres.

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