Cubic metric volume unit.
Cubic Gigameters to Cubic Megameters Converter — Gm3 to Mm3
Convert Cubic Gigameter (Gm3) to Cubic Megameter (Mm3) using the exact conversion factor (1 cubic gigameter = 1,000,000,000 cubic megameter). See the formula, worked examples, and conversion table.
Cubic Gigameters to Cubic Megameters converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
Cubic metric volume unit.
Result = input x 1e+27 / 1e+18.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic Gigameters to Cubic Megameters
Cubic Gigameter and Cubic Megameter appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Both are cubic metric volume unit units.
Formula
cubic megameters = cubic gigameters × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic gigameter equals 1e+27 base units, and 1 cubic megameter equals 1e+18 base units, so dividing one by the other gives the direct cubic gigameter-to-cubic megameter factor of 1000000000.
Simple example
1 Gm3 × 1000000000 = 1,000,000,000 Mm3
1 cubic gigameter = 1,000,000,000 cubic megameters.
Real-world example
10 Gm3 × 1000000000 = 10,000,000,000 Mm3
10 cubic gigameters = 10,000,000,000 cubic megameters.
Conversion table
| Cubic Gigameter (Gm3) | Cubic Megameter (Mm3) |
|---|---|
| 1 Gm3 | 1,000,000,000 Mm3 |
| 5 Gm3 | 5,000,000,000 Mm3 |
| 10 Gm3 | 10,000,000,000 Mm3 |
| 25 Gm3 | 25,000,000,000 Mm3 |
| 50 Gm3 | 50,000,000,000 Mm3 |
| 100 Gm3 | 100,000,000,000 Mm3 |
Reverse conversion: Cubic Megameter to Cubic Gigameter
1 Mm3 × 1e-9 = 1e-9 Gm3
1 cubic megameter = 1e-9 cubic gigameters.
cubic gigameters = cubic megameters × 1e-9
For a page dedicated to this direction, see Cubic Megameter to Cubic Gigameter.
Understanding the Cubic Gigameter (Gm3)
Cubic metric volume unit.
Understanding the Cubic Megameter (Mm3)
Cubic metric volume unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic megameters are in 1 cubic gigameter?
1 cubic gigameter equals 1,000,000,000 cubic megameters, using the exact defined conversion factor rather than an estimate.
How do I convert cubic gigameter to cubic megameter?
Multiply the cubic gigameter value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert cubic megameter back to cubic gigameter?
Use the reverse factor: 1 cubic megameter equals 1e-9 cubic gigameters. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic gigameter?
Cubic Gigameter (Gm3) is a unit of volume.
What is a cubic megameter?
Cubic Megameter (Mm3) is a unit of volume.
Is the cubic gigameter to cubic megameter conversion exact?
Yes. Both cubic gigameter and cubic megameter are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 used above is exact to as many digits as you choose to display.