Mass per volume density.
Drams per Teaspoon to Grains per Gallon Converter — dr/tsp to gr/gal
Convert Dram per Teaspoon (dr/tsp) to Grain per Gallon (gr/gal) using the exact conversion factor (1 dram per teaspoon = 21,000 grain per gallon). See the formula, worked examples, and conversion table.
Drams per Teaspoon 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 359.479282 / 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 Teaspoon to Grains per Gallon
Dram per Teaspoon 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 teaspoon × 21000
This factor comes from each unit's defined relationship to the category's base unit: 1 dram per teaspoon equals 359.479281951 base units, and 1 grain per gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct dram per teaspoon-to-grain per gallon factor of 21000.
Simple example
1 dr/tsp × 21000 = 21,000 gr/gal
1 dram per teaspoon = 21,000 grains per gallon.
Real-world example
1,000 dr/tsp × 21000 = 21,000,000 gr/gal
1,000 drams per teaspoon = 21,000,000 grains per gallon.
Conversion table
| Dram per Teaspoon (dr/tsp) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 dr/tsp | 2,100 gr/gal |
| 1 dr/tsp | 21,000 gr/gal |
| 10 dr/tsp | 210,000 gr/gal |
| 100 dr/tsp | 2,100,000 gr/gal |
| 1,000 dr/tsp | 21,000,000 gr/gal |
| 10,000 dr/tsp | 210,000,000 gr/gal |
Reverse conversion: Grain per Gallon to Dram per Teaspoon
1 gr/gal × 0.00004761904762 = 0.000047619 dr/tsp
1 grain per gallon = 0.000047619 drams per teaspoon.
drams per teaspoon = grains per gallon × 0.000047619047619
For a page dedicated to this direction, see Grain per Gallon to Dram per Teaspoon.
Understanding the Dram per Teaspoon (dr/tsp)
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 teaspoon?
1 dram per teaspoon equals 21,000 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert dram per teaspoon to grain per gallon?
Multiply the dram per teaspoon value by 21000. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to dram per teaspoon?
Use the reverse factor: 1 grain per gallon equals 0.000047619 drams per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a dram per teaspoon?
Dram per Teaspoon (dr/tsp) 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 teaspoon to grain per gallon conversion exact?
Yes. Both dram per teaspoon and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 21000 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.