Mass per volume density.
Grains per Quart to Stones per Gallon Converter — gr/qt to st/gal
Convert Grain per Quart (gr/qt) to Stone per Gallon (st/gal) using the exact conversion factor (1 grain per quart = 0.0000408163 stone per gallon). See the formula, worked examples, and conversion table.
Grains per Quart to Stones 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 0.06847224418 / 1677.569982.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Quart to Stones per Gallon
Grain per Quart and Stone 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
stones per gallon = grains per quart × 0.0000408163265306
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per quart equals 0.0684722441811 base units, and 1 stone per gallon equals 1677.56998244 base units, so dividing one by the other gives the direct grain per quart-to-stone per gallon factor of 0.0000408163265306.
Simple example
1 gr/qt × 0.00004081632653 = 0.0000408163 st/gal
1 grain per quart = 0.0000408163 stones per gallon.
Real-world example
1,000 gr/qt × 0.00004081632653 = 0.0408163265 st/gal
1,000 grains per quart = 0.0408163265 stones per gallon.
Conversion table
| Grain per Quart (gr/qt) | Stone per Gallon (st/gal) |
|---|---|
| 0.1 gr/qt | 0.0000040816 st/gal |
| 1 gr/qt | 0.0000408163 st/gal |
| 10 gr/qt | 0.0004081633 st/gal |
| 100 gr/qt | 0.0040816327 st/gal |
| 1,000 gr/qt | 0.0408163265 st/gal |
| 10,000 gr/qt | 0.4081632653 st/gal |
Reverse conversion: Stone per Gallon to Grain per Quart
0.0000408163 st/gal × 24500 = 0.99999935 gr/qt
0.0000408163 stones per gallon = 0.99999935 grains per quart.
grains per quart = stones per gallon × 24500
For a page dedicated to this direction, see Stone per Gallon to Grain per Quart.
Understanding the Grain per Quart (gr/qt)
Mass per volume density.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per gallon are in 1 grain per quart?
1 grain per quart equals 0.0000408163 stones per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert grain per quart to stone per gallon?
Multiply the grain per quart value by 0.00004081632653. The converter above does this instantly to whatever precision you set.
How do I convert stone per gallon back to grain per quart?
Use the reverse factor: 1 stone per gallon equals 24,500 grains per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per quart?
Grain per Quart (gr/qt) is a unit of density.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
Is the grain per quart to stone per gallon conversion exact?
Yes. Both grain per quart and stone per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.00004081632653 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.