Convert Light Year to Foot
Enter the number of light years that you want to convert to feet.
How to Convert Light Years to Feet
The light year and foot are both units of length. By definition, 1 light year equals exactly 3.1040026247e16 feet. This means to convert light years to feet, you multiply by 3.1040026247e16.
Formula
Step-by-Step Example
Convert 5 ly to feet:
We need to convert light years to feet
Since 1 ly = 3.1040026247e16 ft, multiply by 3.1040026247e16
5 × 3.1040026247e16 = 1.5520013123e17
5 ly = 1.5520013123e17 ft
Light Year to Foot Conversion Table
Quick reference table for common light year to foot conversions. Click any value for detailed calculation.
| Light Years (ly) | Feet (ft) |
|---|---|
| 0.1 ly | 3.1040026247e15 ft |
| 0.5 ly | 1.5520013123e16 ft |
| 1 ly | 3.1040026247e16 ft |
| 2 ly | 6.2080052493e16 ft |
| 5 ly | 1.5520013123e17 ft |
| 10 ly | 3.1040026247e17 ft |
| 25 ly | 7.7600065617e17 ft |
| 50 ly | 1.5520013123e18 ft |
| 100 ly | 3.1040026247e18 ft |
About These Units
Light Year (ly)
A light year (ly) is the distance light travels in one year: approximately 9.461 trillion kilometers or 5.879 trillion miles. Light years measure interstellar distances. The nearest star Proxima Centauri is 4.24 light years away. Light travels 299,792 km/second.
Foot (ft)
A foot (ft) is an imperial unit equal to 12 inches or 30.48 centimeters exactly. Feet measure human height, room dimensions, building heights, and elevation in the US. One foot equals 0.3048 meters. Aviation altitude is measured in feet worldwide.
Frequently Asked Questions
How do I convert light years to feet?
To convert light years to feet, multiply the value by 3.1040026247e16. For example, 10 ly = 3.1040026247e17 ft.
How many feet are in 1 light year?
1 light year equals 3.1040026247e16 feet.
What is the formula for light years to feet?
The formula is: ft = ly × 3.1040026247e16.