Mass per volume density.
Drams per Pint to Grains per Gallon Converter — dr/pt to gr/gal
Convert Dram per Pint (dr/pt) to Grain per Gallon (gr/gal) using the exact conversion factor (1 dram per pint = 218.75 grain per gallon). See the formula, worked examples, and conversion table.
Drams per Pint to Grains 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 3.744575854 / 0.01711806105.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Drams per Pint to Grains per Gallon
Dram per Pint and Grain 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
grains per gallon = drams per pint × 218.75
This factor comes from each unit's defined relationship to the category's base unit: 1 dram per pint equals 3.74457585365 base units, and 1 grain per gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct dram per pint-to-grain per gallon factor of 218.75.
Simple example
1 dr/pt × 218.75 = 218.75 gr/gal
1 dram per pint = 218.75 grains per gallon.
Real-world example
1,000 dr/pt × 218.75 = 218,750 gr/gal
1,000 drams per pint = 218,750 grains per gallon.
Conversion table
| Dram per Pint (dr/pt) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 dr/pt | 21.875 gr/gal |
| 1 dr/pt | 218.75 gr/gal |
| 10 dr/pt | 2,187.5 gr/gal |
| 100 dr/pt | 21,875 gr/gal |
| 1,000 dr/pt | 218,750 gr/gal |
| 10,000 dr/pt | 2,187,500 gr/gal |
Reverse conversion: Grain per Gallon to Dram per Pint
218.75 gr/gal × 0.004571428571 = 1 dr/pt
218.75 grains per gallon = 1 drams per pint.
drams per pint = grains per gallon × 0.00457142857143
For a page dedicated to this direction, see Grain per Gallon to Dram per Pint.
Understanding the Dram per Pint (dr/pt)
Mass per volume density.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per gallon are in 1 dram per pint?
1 dram per pint equals 218.75 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert dram per pint to grain per gallon?
Multiply the dram per pint value by 218.75. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to dram per pint?
Use the reverse factor: 1 grain per gallon equals 0.0045714286 drams per pint. You can also use the swap control in the converter above to flip the direction instantly.
What is a dram per pint?
Dram per Pint (dr/pt) is a unit of density.
What is a grain per gallon?
Grain per Gallon (gr/gal) is a unit of density.
Is the dram per pint to grain per gallon conversion exact?
Yes. Both dram per pint and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 218.75 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.