Mass per volume density.
Grains per Cubic Millimeter to Stones per Quart Converter — gr/mm3 to st/qt
Convert Grain per Cubic Millimeter (gr/mm3) to Stone per Quart (st/qt) using the exact conversion factor (1 grain per cubic millimeter = 9.656662714 stone per quart). See the formula, worked examples, and conversion table.
Grains per Cubic Millimeter 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 64798.91 / 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 Cubic Millimeter to Stones per Quart
Grain per Cubic Millimeter 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 cubic millimeter × 9.65666271429
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per cubic millimeter equals 64798.91 base units, and 1 stone per quart equals 6710.27992975 base units, so dividing one by the other gives the direct grain per cubic millimeter-to-stone per quart factor of 9.65666271429.
Simple example
1 gr/mm3 × 9.656662714 = 9.656662714 st/qt
1 grain per cubic millimeter = 9.656662714 stones per quart.
Real-world example
1,000 gr/mm3 × 9.656662714 = 9,656.662714 st/qt
1,000 grains per cubic millimeter = 9,656.662714 stones per quart.
Conversion table
| Grain per Cubic Millimeter (gr/mm3) | Stone per Quart (st/qt) |
|---|---|
| 0.1 gr/mm3 | 0.9656662714 st/qt |
| 1 gr/mm3 | 9.656662714 st/qt |
| 10 gr/mm3 | 96.56662714 st/qt |
| 100 gr/mm3 | 965.6662714 st/qt |
| 1,000 gr/mm3 | 9,656.662714 st/qt |
| 10,000 gr/mm3 | 96,566.62714 st/qt |
Reverse conversion: Stone per Quart to Grain per Cubic Millimeter
9.656662714 st/qt × 0.1035554445 = 1 gr/mm3
9.656662714 stones per quart = 1 grains per cubic millimeter.
grains per cubic millimeter = stones per quart × 0.103555444524
For a page dedicated to this direction, see Stone per Quart to Grain per Cubic Millimeter.
Understanding the Grain per Cubic Millimeter (gr/mm3)
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 cubic millimeter?
1 grain per cubic millimeter equals 9.656662714 stones per quart, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cubic millimeter to stone per quart?
Multiply the grain per cubic millimeter value by 9.656662714. The converter above does this instantly to whatever precision you set.
How do I convert stone per quart back to grain per cubic millimeter?
Use the reverse factor: 1 stone per quart equals 0.1035554445 grains per cubic millimeter. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per cubic millimeter?
Grain per Cubic Millimeter (gr/mm3) 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 cubic millimeter to stone per quart conversion exact?
Yes. Both grain per cubic millimeter and stone per quart are defined by fixed standards rather than physical artifacts, so the factor of 9.656662714 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.