Light-years to astronomical units
Type a value in ly to get it in AU instantly.
63,241.08AU
That's 383× as far as Voyager 1, while Proxima Centauri is 4.2× further. Light takes about 1 years to cross it.
What it means
How far is that?
One astronomical unit is defined as exactly 149,597,870,700 m, and a light-year uses the Julian year of 365.25 days.
The math
How to convert ly to AU
To convert light-years to astronomical units, multiply by 63,241.1.
Example: 1 ly × 63,241.1 = 63,241.1 AU.
In the other direction, 1 AU = 1.581×10⁻⁵ ly.
Every unit
Your distance in every unit
Tables
ly to AU conversion table
| ly | AU |
|---|---|
| 0.1 ly | 6,324.11 AU |
| 0.5 ly | 31,620.5 AU |
| 1 ly | 63,241.1 AU |
| 2 ly | 126,482 AU |
| 5 ly | 316,205 AU |
| 10 ly | 632,411 AU |
| 25 ly | 1,581,030 AU |
| 50 ly | 3,162,050 AU |
| 100 ly | 6,324,110 AU |
| 500 ly | 31,620,500 AU |
| 1,000 ly | 63,241,100 AU |
AU to ly conversion table
| AU | ly |
|---|---|
| 0.1 AU | 1.581×10⁻⁶ ly |
| 0.5 AU | 7.906×10⁻⁶ ly |
| 1 AU | 1.581×10⁻⁵ ly |
| 2 AU | 3.163×10⁻⁵ ly |
| 5 AU | 7.906×10⁻⁵ ly |
| 10 AU | 0.000158125 ly |
| 25 AU | 0.000395313 ly |
| 50 AU | 0.000790625 ly |
| 100 AU | 0.00158125 ly |
| 500 AU | 0.00790625 ly |
| 1,000 AU | 0.0158125 ly |
Quick answers
Quick answers
- How many AU is 1 ly?
- 1 ly is 63,241.1 AU.
- How many AU is 10 ly?
- 10 ly is 632,411 AU.
The units
About these units
Light-years (ly)
How far light travels in a Julian year: 9.46 trillion kilometers.
Astronomical units (AU)
The Earth–Sun distance, fixed at 149,597,870,700 m. The ruler of the solar system.
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