About the Units
cubic kilometer (km³)
A large volume unit equal to 10^9 cubic meters, used in geological and geographical measurements.
Learn more about cubic kilometers
cubic megameter (Mm³)
A volume unit equal to 10^18 cubic meters.
Common Conversions
- 1 km³ = 1e-9 Mm³
- 1000000000.0 km³ = 1 Mm³