Mass per volume density.
Stones per Cubic foot to Grains per Gallon Converter — st/ft3 to gr/gal
Convert Stone per Cubic foot (st/ft3) to Grain per Gallon (gr/gal) using the exact conversion factor (1 stone per cubic foot = 13,100.69444 grain per gallon). See the formula, worked examples, and conversion table.
Stones per Cubic foot 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 224.2584872 / 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 foot to Grains per Gallon
Stone per Cubic foot 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 foot × 13100.6944444
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cubic foot equals 224.258487235 base units, and 1 grain per gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct stone per cubic foot-to-grain per gallon factor of 13100.6944444.
Simple example
1 st/ft3 × 13100.69444 = 13,100.69444 gr/gal
1 stone per cubic foot = 13,100.69444 grains per gallon.
Real-world example
1,000 st/ft3 × 13100.69444 = 13,100,694.44 gr/gal
1,000 stones per cubic foot = 13,100,694.44 grains per gallon.
Conversion table
| Stone per Cubic foot (st/ft3) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 st/ft3 | 1,310.069444 gr/gal |
| 1 st/ft3 | 13,100.69444 gr/gal |
| 10 st/ft3 | 131,006.9444 gr/gal |
| 100 st/ft3 | 1,310,069.444 gr/gal |
| 1,000 st/ft3 | 13,100,694.44 gr/gal |
| 10,000 st/ft3 | 131,006,944.4 gr/gal |
Reverse conversion: Grain per Gallon to Stone per Cubic foot
1 gr/gal × 0.00007633183143 = 0.0000763318 st/ft3
1 grain per gallon = 0.0000763318 stones per cubic foot.
stones per cubic foot = grains per gallon × 0.0000763318314339
For a page dedicated to this direction, see Grain per Gallon to Stone per Cubic foot.
Understanding the Stone per Cubic foot (st/ft3)
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 foot?
1 stone per cubic foot equals 13,100.69444 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cubic foot to grain per gallon?
Multiply the stone per cubic foot value by 13100.69444. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to stone per cubic foot?
Use the reverse factor: 1 grain per gallon equals 0.0000763318 stones per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cubic foot?
Stone per Cubic foot (st/ft3) 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 foot to grain per gallon conversion exact?
Yes. Both stone per cubic foot and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 13100.69444 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.