Mass per volume density.
Grams per Cubic Meter to Grams per Cubic Millimeter Converter — g/m3 to g/mm3
Convert Gram per Cubic Meter (g/m3) to Gram per Cubic Millimeter (g/mm3) using the exact conversion factor (1 gram per cubic meter = 1e-9 gram per cubic millimeter). See the formula, worked examples, and conversion table.
Grams per Cubic Meter to Grams per Cubic Millimeter converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 0.001 / 1e+6.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams per Cubic Meter to Grams per Cubic Millimeter
Gram per Cubic Meter and Gram per Cubic Millimeter both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Both are mass per volume density units.
Formula
grams per cubic millimeter = grams per cubic meter × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per cubic meter equals 0.001 base units, and 1 gram per cubic millimeter equals 1000000 base units, so dividing one by the other gives the direct gram per cubic meter-to-gram per cubic millimeter factor of 1e-9.
Simple example
1 g/m3 × 1e-9 = 1e-9 g/mm3
1 gram per cubic meter = 1e-9 grams per cubic millimeter.
Real-world example
1,000 g/m3 × 1e-9 = 0.000001 g/mm3
1,000 grams per cubic meter = 0.000001 grams per cubic millimeter.
Conversion table
| Gram per Cubic Meter (g/m3) | Gram per Cubic Millimeter (g/mm3) |
|---|---|
| 0.1 g/m3 | 1e-10 g/mm3 |
| 1 g/m3 | 1e-9 g/mm3 |
| 10 g/m3 | 1e-8 g/mm3 |
| 100 g/m3 | 1e-7 g/mm3 |
| 1,000 g/m3 | 0.000001 g/mm3 |
| 10,000 g/m3 | 0.00001 g/mm3 |
Reverse conversion: Gram per Cubic Millimeter to Gram per Cubic Meter
1e-9 g/mm3 × 1000000000 = 1 g/m3
1e-9 grams per cubic millimeter = 1 gram per cubic meter.
grams per cubic meter = grams per cubic millimeter × 1000000000
For a page dedicated to this direction, see Gram per Cubic Millimeter to Gram per Cubic Meter.
Understanding the Gram per Cubic Meter (g/m3)
Mass per volume density.
Understanding the Gram per Cubic Millimeter (g/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per cubic millimeter are in 1 gram per cubic meter?
1 gram per cubic meter equals 1e-9 grams per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert gram per cubic meter to gram per cubic millimeter?
Multiply the gram per cubic meter value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert gram per cubic millimeter back to gram per cubic meter?
Use the reverse factor: 1 gram per cubic millimeter equals 1,000,000,000 grams per cubic meter. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per cubic meter?
Gram per Cubic Meter (g/m3) is a unit of density.
What is a gram per cubic millimeter?
Gram per Cubic Millimeter (g/mm3) is a unit of density.
Is the gram per cubic meter to gram per cubic millimeter conversion exact?
Yes. Both gram per cubic meter and gram per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 1e-9 used above is exact to as many digits as you choose to display.
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.