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