Full name: gigametre
Plural form: gigameters
Alternate spelling: gigmetres
Category type: length
Scale factor: 1000000000
The SI base unit for length is the metre.
1 metre is equal to 1.0E-9 gigameter.
Valid units must be of the length type.
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A gigametre (American spelling: gigameter, symbol: Gm) is a unit of length equal to 10^9 metres. Its customary equivalent is 621,371 miles.