Mass per volume density.
Grains per Gallon to Stones per Quart Converter — gr/gal to st/qt
Convert Grain per Gallon (gr/gal) to Stone per Quart (st/qt) using the exact conversion factor (1 grain per gallon = 0.000002551 stone per quart). See the formula, worked examples, and conversion table.
Grains per Gallon to Stones per Quart 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 / 6710.27993.
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 Stones per Quart
Grain per Gallon and Stone per Quart 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
stones per quart = grains per gallon × 0.00000255102040816
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 stone per quart equals 6710.27992975 base units, so dividing one by the other gives the direct grain per gallon-to-stone per quart factor of 0.00000255102040816.
Simple example
1 gr/gal × 0.000002551020408 = 0.000002551 st/qt
1 grain per gallon = 0.000002551 stones per quart.
Real-world example
1,000 gr/gal × 0.000002551020408 = 0.0025510204 st/qt
1,000 grains per gallon = 0.0025510204 stones per quart.
Conversion table
| Grain per Gallon (gr/gal) | Stone per Quart (st/qt) |
|---|---|
| 0.1 gr/gal | 2.55102e-7 st/qt |
| 1 gr/gal | 0.000002551 st/qt |
| 10 gr/gal | 0.0000255102 st/qt |
| 100 gr/gal | 0.000255102 st/qt |
| 1,000 gr/gal | 0.0025510204 st/qt |
| 10,000 gr/gal | 0.0255102041 st/qt |
Reverse conversion: Stone per Quart to Grain per Gallon
0.000002551 st/qt × 392000 = 0.999992 gr/gal
0.000002551 stones per quart = 0.999992 grains per gallon.
grains per gallon = stones per quart × 392000
For a page dedicated to this direction, see Stone per Quart to Grain per Gallon.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Understanding the Stone per Quart (st/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per quart are in 1 grain per gallon?
1 grain per gallon equals 0.000002551 stones per quart, using the exact defined conversion factor rather than an estimate.
How do I convert grain per gallon to stone per quart?
Multiply the grain per gallon value by 0.000002551020408. The converter above does this instantly to whatever precision you set.
How do I convert stone per quart back to grain per gallon?
Use the reverse factor: 1 stone per quart equals 392,000 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 stone per quart?
Stone per Quart (st/qt) is a unit of density.
Is the grain per gallon to stone per quart conversion exact?
Yes. Both grain per gallon and stone per quart are defined by fixed standards rather than physical artifacts, so the factor of 0.000002551020408 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.