Cubic metric volume unit.
Cubic Hectometers to Cubic Gigameters Converter — hm3 to Gm3
Convert Cubic Hectometer (hm3) to Cubic Gigameter (Gm3) using the exact conversion factor (1 cubic hectometer = 1e-21 cubic gigameter). See the formula, worked examples, and conversion table.
Cubic Hectometers to Cubic Gigameters 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+6 / 1e+27.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic Hectometers to Cubic Gigameters
Cubic Hectometer and Cubic Gigameter 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 gigameters = cubic hectometers × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic hectometer equals 1000000 base units, and 1 cubic gigameter equals 1e+27 base units, so dividing one by the other gives the direct cubic hectometer-to-cubic gigameter factor of 1e-21.
Simple example
1 hm3 × 1e-21 = 1e-21 Gm3
1 cubic hectometer = 1e-21 cubic gigameters.
Real-world example
10 hm3 × 1e-21 = 1e-20 Gm3
10 cubic hectometers = 1e-20 cubic gigameters.
Conversion table
| Cubic Hectometer (hm3) | Cubic Gigameter (Gm3) |
|---|---|
| 1 hm3 | 1e-21 Gm3 |
| 5 hm3 | 5e-21 Gm3 |
| 10 hm3 | 1e-20 Gm3 |
| 25 hm3 | 2.5e-20 Gm3 |
| 50 hm3 | 5e-20 Gm3 |
| 100 hm3 | 1e-19 Gm3 |
Reverse conversion: Cubic Gigameter to Cubic Hectometer
1e-21 Gm3 × 1e+21 = 1 hm3
1e-21 cubic gigameters = 1 cubic hectometers.
cubic hectometers = cubic gigameters × 1e+21
For a page dedicated to this direction, see Cubic Gigameter to Cubic Hectometer.
Understanding the Cubic Hectometer (hm3)
Cubic metric volume unit.
Understanding the Cubic Gigameter (Gm3)
Cubic metric volume unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic gigameters are in 1 cubic hectometer?
1 cubic hectometer equals 1e-21 cubic gigameters, using the exact defined conversion factor rather than an estimate.
How do I convert cubic hectometer to cubic gigameter?
Multiply the cubic hectometer value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert cubic gigameter back to cubic hectometer?
Use the reverse factor: 1 cubic gigameter equals 1e+21 cubic hectometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic hectometer?
Cubic Hectometer (hm3) is a unit of volume.
What is a cubic gigameter?
Cubic Gigameter (Gm3) is a unit of volume.
Is the cubic hectometer to cubic gigameter conversion exact?
Yes. Both cubic hectometer and cubic gigameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-21 used above is exact to as many digits as you choose to display.