About the Units
zettameter (Zm)
A massive length unit equal to 10^21 meters.
foot (U.S. survey) (ft (U.S. survey))
A slightly different foot unit used in land surveying.
Common Conversions
- 1 Zm = 3.2808335e21 ft (U.S. survey)
- 3.0480058e-22 Zm = 1 ft (U.S. survey)