To convert astronomical units to light years, multiply the value by 1.58125 × 10⁻⁵. To go the other way, multiply light years by 63,241.1 to get astronomical units.
| Astronomical Units (AU) | Light Years (ly) |
|---|---|
| 1 AU | 1.58125 × 10⁻⁵ ly |
| 5 AU | 7.90625 × 10⁻⁵ ly |
| 10 AU | 0.000158125 ly |
| 25 AU | 0.000395313 ly |
| 50 AU | 0.000790625 ly |
| 100 AU | 0.00158125 ly |
| 250 AU | 0.00395313 ly |
| 500 AU | 0.00790625 ly |
| 1,000 AU | 0.0158125 ly |
| 2,500 AU | 0.0395313 ly |
| 5,000 AU | 0.0790625 ly |
| 10,000 AU | 0.158125 ly |
| 100,000 AU | 1.58125 ly |
| 1,000,000 AU | 15.8125 ly |
25 AU × 1.58125 × 10⁻⁵ = 0.000395313 ly
Try this example →250 AU × 1.58125 × 10⁻⁵ = 0.00395313 ly
Try this example →Astronomical unit (AU). An astronomical unit is the average distance from the Earth to the Sun, about 149.6 million kilometers.
Light year (ly). A light year is the distance light travels in one year, about 9.46 trillion kilometers.
There are 1.58125 × 10⁻⁵ light years in one astronomical unit.
Multiply the number of astronomical units by 1.58125 × 10⁻⁵. For example, 10 astronomical units equal 0.000158125 light years.
One light year equals 63,241.1 astronomical units.
0.0158125 light years. Other common values: 100 astronomical units = 0.00158125 light years and 10,000 astronomical units = 0.158125 light years.