About the Units
femtometer (fm)
An ultra-small length unit used in nuclear and particle physics.
megameter (Mm)
A length unit equal to 10^6 meters.
Common Conversions
- 1 fm = 1e-21 Mm
- 1e21 fm = 1 Mm
Convert from femtometers to megameters
Conversion Information
To convert from femtometers to megameters, multiply by 1e-21
1 fm = 1e-21 Mm