Convert Light Year to Mile
Use this free converter to change light years (ly) into miles (mi). Light year and mile both measure length. As a quick reference, 1 ly equals 5.8786e+12 mi, and 1 mi equals 1.7011e-13 ly.
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Mile (mi)
5.8786e+12
1 ly = 5.8786e+12 mi
Length conversion table
| Light Year | Mile |
|---|---|
| 0.01 | 58786064000 |
| 0.1 | 587860640000 |
| 0.5 | 2.9393e+12 |
| 1 | 5.8786e+12 |
| 2 | 1.1757e+13 |
| 3 | 1.7636e+13 |
| 5 | 2.9393e+13 |
| 10 | 5.8786e+13 |
| 20 | 1.1757e+14 |
| 25 | 1.4697e+14 |
| 50 | 2.9393e+14 |
| 100 | 5.8786e+14 |
| 1,000 | 5.8786e+15 |
How to convert Light Year to Mile
Multiply the light year value by 5.8786e+12 to get miles.
- Enter the number of light years you want to convert.
- The converter instantly shows the equivalent value in miles.
- Worked example: 15 ly × 5.8786e+12 = 8.8179e+13 mi.
- Use the swap button to reverse the conversion (mile to light year).
About these units
Light Year (ly)
- Definition
- A light-year (ly) is the distance light travels in one year in a vacuum, about 9.46 trillion kilometers.
- History
- The concept arose in the 19th century as astronomers sought an intuitive way to express the vast distances between stars.
- Current use
- Light-years express distances to stars and galaxies in astronomy and popular science.
Mile (mi)
- Definition
- A mile (mi) is an imperial unit of length equal to exactly 1,609.344 meters, or 5,280 feet.
- History
- It descends from the Roman "mille passus" (a thousand paces) and was standardised in England in 1593 as the statute mile.
- Current use
- Miles remain the everyday unit for road distance and speed in the United States and United Kingdom.
Frequently asked questions
How many miles are in a light year?
There are 5.8786e+12 mi in 1 ly. To convert, multiply the number of light years by 5.8786e+12.
How do I convert light years to miles?
Multiply the light year value by 5.8786e+12 to get miles. For example, 10 ly = 5.8786e+13 mi.
Is this light year-to-mile converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Light Year to other length units
| Unit | 1 Light Year equals |
|---|---|
| Meter (m) | 9.4607e+15 m |
| Kilometer (km) | 9.4607e+12 km |
| Centimeter (cm) | 9.4607e+17 cm |
| Millimeter (mm) | 9.4607e+18 mm |
| Micrometer (µm) | 9.4607e+21 µm |
| Nanometer (nm) | 9.4607e+24 nm |
| Mile (mi) | 5.8786e+12 mi |
| Yard (yd) | 1.0346e+16 yd |
| Foot (ft) | 3.1039e+16 ft |
| Inch (in) | 3.7247e+17 in |
| Nautical Mile (nmi) | 5.1084e+12 nmi |