Convert Miles to light years
1 mile = 1.701078e-13 light years · ly = mi ÷ 5,878,625,373,000
When you need this conversion
This conversion goes from miles, the standard road distance unit in the US and UK, to light years, the astronomical distance light travels in a year. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.
Miles to light years conversion table
| Miles (mi) | Light years (ly) |
|---|---|
| 1 mi | 1.701078e-13 ly |
| 2 mi | 3.402156e-13 ly |
| 3 mi | 5.103234e-13 ly |
| 5 mi | 8.505390e-13 ly |
| 10 mi | 1.701078e-12 ly |
| 15 mi | 2.551617e-12 ly |
| 20 mi | 3.402156e-12 ly |
| 25 mi | 4.252695e-12 ly |
| 50 mi | 8.505390e-12 ly |
| 75 mi | 1.275808e-11 ly |
| 100 mi | 1.701078e-11 ly |
| 250 mi | 4.252695e-11 ly |
| 500 mi | 8.505390e-11 ly |
| 1,000 mi | 1.701078e-10 ly |
The formula
ly = mi ÷ 5,878,625,373,000Because both units measure length, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Light years to miles →Related length conversions
- Millimeters to micrometers
- Centimeters to inches
- Centimeters to feet
- Meters to kilometers
- Kilometers to meters
- Inches to centimeters
- Feet to centimeters
- Feet to yards
- Yards to feet
- Micrometers to millimeters
- Millimeters to light years
- Centimeters to light years
Frequently asked questions
- How many light years are in a mile?
- There are 1.701078e-13 light years in 1 mile. The formula is ly = mi ÷ 5,878,625,373,000.
- How do you convert miles to light years?
- Use the formula ly = mi ÷ 5,878,625,373,000. For example, 10 miles equals 1.701078e-12 light years.
- Is the miles to light years conversion exact?
- Yes. Miles and light years are both units of length, related by an exact defined factor. Displayed results are rounded for readability.
- What is mi short for?
- mi is the standard symbol for mile. ly is the symbol for light year.