Full name: megametre
Plural form: megameters
Symbol: Mm
Alternate spelling: megametres
Category type: length
Scale factor: 1000000
The SI base unit for length is the metre.
1 metre is equal to 1.0E-6 megametre.
Valid units must be of the length type.
You can use this form to select from known units:
A megametre (American spelling: megameter, symbol: Mm) is a unit of length equal to 10^6 metres (from the Greek words megas = big and metro = count/measure). Its customary equivalent is 621.37 miles.