Convert light-years to miles
1 ly = 5878625373180 mi — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
How to convert light-years to miles
Multiply the number of light-years by 5878625373180 to get miles.
Light-year: Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
Mile: The statute mile: 5280 international feet, exactly 1609.344 m.
Light-year to Mile conversion table
| Light-years (ly) | Miles (mi) |
|---|---|
| 1 ly | 5 878 625 400 000 |
| 2 ly | 11 757 251 000 000 |
| 3 ly | 17 635 876 000 000 |
| 5 ly | 29 393 127 000 000 |
| 10 ly | 58 786 254 000 000 |
| 20 ly | 117 572 510 000 000 |
| 25 ly | 146 965 630 000 000 |
| 50 ly | 293 931 270 000 000 |
| 100 ly | 587 862 540 000 000 |
| 250 ly | 1 469 656 300 000 000 |
| 500 ly | 2 939 312 700 000 000 |
| 1000 ly | 5 878 625 400 000 000 |
Mile to Light-year conversion table
| Miles (mi) | Light-years (ly) |
|---|---|
| 1 mi | 1.701078e-13 |
| 2 mi | 3.4021559e-13 |
| 3 mi | 5.1032339e-13 |
| 5 mi | 8.5053898e-13 |
| 10 mi | 1.701078e-12 |
| 20 mi | 3.4021559e-12 |
| 25 mi | 4.2526949e-12 |
| 50 mi | 8.5053898e-12 |
| 100 mi | 1.701078e-11 |
| 250 mi | 4.2526949e-11 |
| 500 mi | 8.5053898e-11 |
| 1000 mi | 1.701078e-10 |
Frequently asked
How many miles are in a light-year?
One light-year equals 5878625373000 miles (ly → mi). That figure is exact, not rounded.
How do you convert light-years to miles?
Multiply the number of light-years by 5878625373180 to get miles.
What is 1 mi in light-years?
One mile is 1.70107795e-13 light-years.
What is 10 ly in mi?
10 ly = 58 786 254 000 000 mi.
What exactly is a light-year?
Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
What exactly is a mile?
The statute mile: 5280 international feet, exactly 1609.344 m.