About the Units
femtometer (fm)
An ultra-small length unit used in nuclear and particle physics.
mile (U.S. survey) (mi (U.S. survey))
A slightly different mile unit used in land surveying.
Common Conversions
- 1 fm = 6.2137e-19 mi (U.S. survey)
- 1609347000000000000.0 fm = 1 mi (U.S. survey)