One light-year is equal to 5,878,792,849,757.4160 miles.

Astronomers use light-years because the distances in space are so vast that using miles would result in extremely large and cumbersome numbers.

The nearest star, Proxima Centauri, is about 4.24 light-years away, which is approximately 25,000,000,000,000 miles (25 trillion miles).

Yes, to convert miles to light-years, you would divide the distance in miles by 5,878,792,849,757.4160.