Convert Foot to Light Year
Use this free converter to change feet (ft) into light years (ly). Foot and light year both measure length. As a quick reference, 1 ft equals 3.2217e-17 ly, and 1 ly equals 3.1039e+16 ft.
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Light Year (ly)
3.2217e-17
1 ft = 3.2217e-17 ly
Length conversion table
| Foot | Light Year |
|---|---|
| 0.01 | 3.2217e-19 |
| 0.1 | 3.2217e-18 |
| 0.5 | 1.6109e-17 |
| 1 | 3.2217e-17 |
| 2 | 6.4435e-17 |
| 3 | 9.6652e-17 |
| 5 | 1.6109e-16 |
| 10 | 3.2217e-16 |
| 20 | 6.4435e-16 |
| 25 | 8.0544e-16 |
| 50 | 1.6109e-15 |
| 100 | 3.2217e-15 |
| 1,000 | 3.2217e-14 |
How to convert Foot to Light Year
Multiply the foot value by 3.2217e-17 to get light years.
- Enter the number of feet you want to convert.
- The converter instantly shows the equivalent value in light years.
- Worked example: 15 ft × 3.2217e-17 = 4.8326e-16 ly.
- Use the swap button to reverse the conversion (light year to foot).
About these units
Foot (ft)
- Definition
- A foot (ft) is an imperial unit of length equal to 12 inches or exactly 0.3048 meters.
- History
- Derived from the human foot, it varied across regions until the international foot was defined in 1959.
- Current use
- Feet are widely used for height, room dimensions, and aviation altitude, especially in the US and UK.
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.
Frequently asked questions
How many light years are in a foot?
There are 3.2217e-17 ly in 1 ft. To convert, multiply the number of feet by 3.2217e-17.
How do I convert feet to light years?
Multiply the foot value by 3.2217e-17 to get light years. For example, 10 ft = 3.2217e-16 ly.
Is this foot-to-light year 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 Foot to other length units
| Unit | 1 Foot equals |
|---|---|
| Meter (m) | 0.3048 m |
| Kilometer (km) | 0.0003048 km |
| Centimeter (cm) | 30.48 cm |
| Millimeter (mm) | 304.8 mm |
| Micrometer (µm) | 304800 µm |
| Nanometer (nm) | 304800000 nm |
| Mile (mi) | 0.00018939394 mi |
| Yard (yd) | 0.33333333 yd |
| Inch (in) | 12 in |
| Nautical Mile (nmi) | 0.00016457883 nmi |
| Light Year (ly) | 3.2217e-17 ly |