Mass per volume density.
Grains per Gallon to Drams per Cup Converter — gr/gal to dr/cup
Convert Grain per Gallon (gr/gal) to Dram per Cup (dr/cup) using the exact conversion factor (1 grain per gallon = 0.0022857143 dram per cup). See the formula, worked examples, and conversion table.
Grains per Gallon to Drams per Cup 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 0.01711806105 / 7.489151707.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Gallon to Drams per Cup
Grain per Gallon and Dram per Cup 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 cup = grains per gallon × 0.00228571428571
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per gallon equals 0.0171180610453 base units, and 1 dram per cup equals 7.48915170731 base units, so dividing one by the other gives the direct grain per gallon-to-dram per cup factor of 0.00228571428571.
Simple example
1 gr/gal × 0.002285714286 = 0.0022857143 dr/cup
1 grain per gallon = 0.0022857143 drams per cup.
Real-world example
1,000 gr/gal × 0.002285714286 = 2.285714286 dr/cup
1,000 grains per gallon = 2.285714286 drams per cup.
Conversion table
| Grain per Gallon (gr/gal) | Dram per Cup (dr/cup) |
|---|---|
| 0.1 gr/gal | 0.0002285714 dr/cup |
| 1 gr/gal | 0.0022857143 dr/cup |
| 10 gr/gal | 0.0228571429 dr/cup |
| 100 gr/gal | 0.2285714286 dr/cup |
| 1,000 gr/gal | 2.285714286 dr/cup |
| 10,000 gr/gal | 22.85714286 dr/cup |
Reverse conversion: Dram per Cup to Grain per Gallon
0.0022857143 dr/cup × 437.5 = 1.000000006 gr/gal
0.0022857143 drams per cup = 1.000000006 grains per gallon.
grains per gallon = drams per cup × 437.5
For a page dedicated to this direction, see Dram per Cup to Grain per Gallon.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Understanding the Dram per Cup (dr/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per cup are in 1 grain per gallon?
1 grain per gallon equals 0.0022857143 drams per cup, using the exact defined conversion factor rather than an estimate.
How do I convert grain per gallon to dram per cup?
Multiply the grain per gallon value by 0.002285714286. The converter above does this instantly to whatever precision you set.
How do I convert dram per cup back to grain per gallon?
Use the reverse factor: 1 dram per cup equals 437.5 grains per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per gallon?
Grain per Gallon (gr/gal) is a unit of density.
What is a dram per cup?
Dram per Cup (dr/cup) is a unit of density.
Is the grain per gallon to dram per cup conversion exact?
Yes. Both grain per gallon and dram per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.002285714286 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.