About the Units
light year (l. y.)
The distance light travels in one year, used for astronomical measurements.
foot (U.S. survey) (ft (U.S. survey))
A slightly different foot unit used in land surveying.
Common Conversions
- 1 l. y. = 31039078000000000.0 ft (U.S. survey)
- 3.221745e-17 l. y. = 1 ft (U.S. survey)