Mass per volume density.
Grains per Cubic Millimeter to Drams per Gallon Converter — gr/mm3 to dr/gal
Convert Grain per Cubic Millimeter (gr/mm3) to Dram per Gallon (dr/gal) using the exact conversion factor (1 grain per cubic millimeter = 138,437.9167 dram per gallon). See the formula, worked examples, and conversion table.
Grains per Cubic Millimeter to Drams per Gallon 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 64798.91 / 0.4680719817.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Cubic Millimeter to Drams per Gallon
Grain per Cubic Millimeter and Dram per Gallon 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
drams per gallon = grains per cubic millimeter × 138437.916672
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per cubic millimeter equals 64798.91 base units, and 1 dram per gallon equals 0.468071981707 base units, so dividing one by the other gives the direct grain per cubic millimeter-to-dram per gallon factor of 138437.916672.
Simple example
1 gr/mm3 × 138437.9167 = 138,437.9167 dr/gal
1 grain per cubic millimeter = 138,437.9167 drams per gallon.
Real-world example
1,000 gr/mm3 × 138437.9167 = 138,437,916.7 dr/gal
1,000 grains per cubic millimeter = 138,437,916.7 drams per gallon.
Conversion table
| Grain per Cubic Millimeter (gr/mm3) | Dram per Gallon (dr/gal) |
|---|---|
| 0.1 gr/mm3 | 13,843.79167 dr/gal |
| 1 gr/mm3 | 138,437.9167 dr/gal |
| 10 gr/mm3 | 1,384,379.167 dr/gal |
| 100 gr/mm3 | 13,843,791.67 dr/gal |
| 1,000 gr/mm3 | 138,437,916.7 dr/gal |
| 10,000 gr/mm3 | 1,384,379,167 dr/gal |
Reverse conversion: Dram per Gallon to Grain per Cubic Millimeter
1 dr/gal × 0.000007223454557 = 0.0000072235 gr/mm3
1 dram per gallon = 0.0000072235 grains per cubic millimeter.
grains per cubic millimeter = drams per gallon × 0.00000722345455667
For a page dedicated to this direction, see Dram per Gallon to Grain per Cubic Millimeter.
Understanding the Grain per Cubic Millimeter (gr/mm3)
Mass per volume density.
Understanding the Dram per Gallon (dr/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per gallon are in 1 grain per cubic millimeter?
1 grain per cubic millimeter equals 138,437.9167 drams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cubic millimeter to dram per gallon?
Multiply the grain per cubic millimeter value by 138437.9167. The converter above does this instantly to whatever precision you set.
How do I convert dram per gallon back to grain per cubic millimeter?
Use the reverse factor: 1 dram per gallon equals 0.0000072235 grains per cubic millimeter. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per cubic millimeter?
Grain per Cubic Millimeter (gr/mm3) is a unit of density.
What is a dram per gallon?
Dram per Gallon (dr/gal) is a unit of density.
Is the grain per cubic millimeter to dram per gallon conversion exact?
Yes. Both grain per cubic millimeter and dram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 138437.9167 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.