About the Units
gallon (gal)
A standard volume unit for liquids in the United States.
cubic megameter (Mm³)
A volume unit equal to 10^18 cubic meters.
Common Conversions
- 1 gal = 3.785412e-21 Mm³
- 264172020000000000000.0 gal = 1 Mm³
Convert from gallons to cubic megameters
Conversion Information
To convert from gallons to cubic megameters, multiply by 3.785412e-21
1 gal = 3.785412e-21 Mm³