Mass per volume density.
Stones per Cubic yard to Grains per Gallon Converter — st/yd3 to gr/gal
Convert Stone per Cubic yard (st/yd3) to Grain per Gallon (gr/gal) using the exact conversion factor (1 stone per cubic yard = 485.2109053 grain per gallon). See the formula, worked examples, and conversion table.
Stones per Cubic yard 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 8.305869898 / 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 Cubic yard to Grains per Gallon
Stone per Cubic yard 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 cubic yard × 485.21090535
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 gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct stone per cubic yard-to-grain per gallon factor of 485.21090535.
Simple example
1 st/yd3 × 485.2109053 = 485.2109053 gr/gal
1 stone per cubic yard = 485.2109053 grains per gallon.
Real-world example
1,000 st/yd3 × 485.2109053 = 485,210.9053 gr/gal
1,000 stones per cubic yard = 485,210.9053 grains per gallon.
Conversion table
| Stone per Cubic yard (st/yd3) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 st/yd3 | 48.52109053 gr/gal |
| 1 st/yd3 | 485.2109053 gr/gal |
| 10 st/yd3 | 4,852.109053 gr/gal |
| 100 st/yd3 | 48,521.09053 gr/gal |
| 1,000 st/yd3 | 485,210.9053 gr/gal |
| 10,000 st/yd3 | 4,852,109.053 gr/gal |
Reverse conversion: Grain per Gallon to Stone per Cubic yard
485.2109053 gr/gal × 0.002060959449 = 0.9999999999 st/yd3
485.2109053 grains per gallon = 0.9999999999 stones per cubic yard.
stones per cubic yard = grains per gallon × 0.00206095944871
For a page dedicated to this direction, see Grain per Gallon to Stone per Cubic yard.
Understanding the Stone per Cubic yard (st/yd3)
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 cubic yard?
1 stone per cubic yard equals 485.2109053 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cubic yard to grain per gallon?
Multiply the stone per cubic yard value by 485.2109053. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to stone per cubic yard?
Use the reverse factor: 1 grain per gallon equals 0.0020609594 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 gallon?
Grain per Gallon (gr/gal) is a unit of density.
Is the stone per cubic yard to grain per gallon conversion exact?
Yes. Both stone per cubic yard and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 485.2109053 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.