Mass per volume density.
Stones per Cubic yard to Grains per Quart Converter — st/yd3 to gr/qt
Convert Stone per Cubic yard (st/yd3) to Grain per Quart (gr/qt) using the exact conversion factor (1 stone per cubic yard = 121.3027263 grain per quart). See the formula, worked examples, and conversion table.
Stones per Cubic yard to Grains 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 8.305869898 / 0.06847224418.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Cubic yard to Grains per Quart
Stone per Cubic yard and Grain 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
grains per quart = stones per cubic yard × 121.302726337
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cubic yard equals 8.30586989761 base units, and 1 grain per quart equals 0.0684722441811 base units, so dividing one by the other gives the direct stone per cubic yard-to-grain per quart factor of 121.302726337.
Simple example
1 st/yd3 × 121.3027263 = 121.3027263 gr/qt
1 stone per cubic yard = 121.3027263 grains per quart.
Real-world example
1,000 st/yd3 × 121.3027263 = 121,302.7263 gr/qt
1,000 stones per cubic yard = 121,302.7263 grains per quart.
Conversion table
| Stone per Cubic yard (st/yd3) | Grain per Quart (gr/qt) |
|---|---|
| 0.1 st/yd3 | 12.13027263 gr/qt |
| 1 st/yd3 | 121.3027263 gr/qt |
| 10 st/yd3 | 1,213.027263 gr/qt |
| 100 st/yd3 | 12,130.27263 gr/qt |
| 1,000 st/yd3 | 121,302.7263 gr/qt |
| 10,000 st/yd3 | 1,213,027.263 gr/qt |
Reverse conversion: Grain per Quart to Stone per Cubic yard
121.3027263 gr/qt × 0.008243837795 = 0.9999999997 st/yd3
121.3027263 grains per quart = 0.9999999997 stones per cubic yard.
stones per cubic yard = grains per quart × 0.00824383779486
For a page dedicated to this direction, see Grain per Quart to Stone per Cubic yard.
Understanding the Stone per Cubic yard (st/yd3)
Mass per volume density.
Understanding the Grain per Quart (gr/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per quart are in 1 stone per cubic yard?
1 stone per cubic yard equals 121.3027263 grains per quart, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cubic yard to grain per quart?
Multiply the stone per cubic yard value by 121.3027263. The converter above does this instantly to whatever precision you set.
How do I convert grain per quart back to stone per cubic yard?
Use the reverse factor: 1 grain per quart equals 0.0082438378 stones per cubic yard. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cubic yard?
Stone per Cubic yard (st/yd3) is a unit of density.
What is a grain per quart?
Grain per Quart (gr/qt) is a unit of density.
Is the stone per cubic yard to grain per quart conversion exact?
Yes. Both stone per cubic yard and grain per quart are defined by fixed standards rather than physical artifacts, so the factor of 121.3027263 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.