Convert Feet to Light Years
Convert Feet (ft) to Light Years (ly) instantly and accurately.
Conversion Formula
ly = ft × 3.221738542e-17
About Feet
A foot (ft) is equal to 12 inches or 30.48 centimeters, originally based on the length of a human foot. It remains widely used in the United States and some other countries for measuring height, room dimensions, and distances. For reference, a standard door is about 6.5-7 feet tall, ceiling height in homes is typically 8-9 feet, and a basketball hoop stands 10 feet high. The foot is also used in aviation (altitude) and real estate (square footage).
About Light Years
A light year (ly) is the distance light travels in one year through a vacuum, approximately 9.46 trillion kilometers. This is the primary unit for measuring stellar distances. Our nearest star neighbor, Proxima Centauri, is 4.24 light years away, meaning its light takes over 4 years to reach us. The center of our Milky Way galaxy is about 26,000 light years distant, and the nearest large galaxy (Andromeda) is 2.5 million light years away. When we observe distant objects, we're literally seeing them as they were years ago.
Quick Reference Table
| Feet (ft) | Light Years (ly) |
|---|---|
| 1 ft | 3.222 × 10-17 ly |
| 2 ft | 6.443 × 10-17 ly |
| 5 ft | 1.611 × 10-16 ly |
| 10 ft | 3.222 × 10-16 ly |
| 25 ft | 8.054 × 10-16 ly |
| 50 ft | 1.611 × 10-15 ly |
| 100 ft | 3.222 × 10-15 ly |