Mass per volume density.
Stones per Quart to Grains per Gallon Converter — st/qt to gr/gal
Convert Stone per Quart (st/qt) to Grain per Gallon (gr/gal) using the exact conversion factor (1 stone per quart = 392,000 grain per gallon). See the formula, worked examples, and conversion table.
Stones per Quart 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 6710.27993 / 0.01711806105.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Quart to Grains per Gallon
Stone per Quart 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 = stones per quart × 392000
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per quart equals 6710.27992975 base units, and 1 grain per gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct stone per quart-to-grain per gallon factor of 392000.
Simple example
1 st/qt × 392000 = 392,000 gr/gal
1 stone per quart = 392,000 grains per gallon.
Real-world example
1,000 st/qt × 392000 = 392,000,000 gr/gal
1,000 stones per quart = 392,000,000 grains per gallon.
Conversion table
| Stone per Quart (st/qt) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 st/qt | 39,200 gr/gal |
| 1 st/qt | 392,000 gr/gal |
| 10 st/qt | 3,920,000 gr/gal |
| 100 st/qt | 39,200,000 gr/gal |
| 1,000 st/qt | 392,000,000 gr/gal |
| 10,000 st/qt | 3,920,000,000 gr/gal |
Reverse conversion: Grain per Gallon to Stone per Quart
1 gr/gal × 0.000002551020408 = 0.000002551 st/qt
1 grain per gallon = 0.000002551 stones per quart.
stones per quart = grains per gallon × 0.00000255102040816
For a page dedicated to this direction, see Grain per Gallon to Stone per Quart.
Understanding the Stone per Quart (st/qt)
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 stone per quart?
1 stone per quart equals 392,000 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per quart to grain per gallon?
Multiply the stone per quart value by 392000. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to stone per quart?
Use the reverse factor: 1 grain per gallon equals 0.000002551 stones per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per quart?
Stone per Quart (st/qt) is a unit of density.
What is a grain per gallon?
Grain per Gallon (gr/gal) is a unit of density.
Is the stone per quart to grain per gallon conversion exact?
Yes. Both stone per quart and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 392000 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.