Mass per volume density.
Stones per Gallon to Grain per Cubic inches Converter — st/gal to gr/in3
Convert Stone per Gallon (st/gal) to Grain per Cubic inch (gr/in3) using the exact conversion factor (1 stone per gallon = 424.2424242 grain per cubic inch). See the formula, worked examples, and conversion table.
Stones per Gallon to Grain per Cubic inches 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 1677.569982 / 3.954272101.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Gallon to Grain per Cubic inches
Stone per Gallon and Grain per Cubic inch 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
grain per cubic inches = stones per gallon × 424.242424242
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per gallon equals 1677.56998244 base units, and 1 grain per cubic inch equals 3.95427210146 base units, so dividing one by the other gives the direct stone per gallon-to-grain per cubic inch factor of 424.242424242.
Simple example
1 st/gal × 424.2424242 = 424.2424242 gr/in3
1 stone per gallon = 424.2424242 grain per cubic inches.
Real-world example
1,000 st/gal × 424.2424242 = 424,242.4242 gr/in3
1,000 stones per gallon = 424,242.4242 grain per cubic inches.
Conversion table
| Stone per Gallon (st/gal) | Grain per Cubic inch (gr/in3) |
|---|---|
| 0.1 st/gal | 42.42424242 gr/in3 |
| 1 st/gal | 424.2424242 gr/in3 |
| 10 st/gal | 4,242.424242 gr/in3 |
| 100 st/gal | 42,424.24242 gr/in3 |
| 1,000 st/gal | 424,242.4242 gr/in3 |
| 10,000 st/gal | 4,242,424.242 gr/in3 |
Reverse conversion: Grain per Cubic inch to Stone per Gallon
424.2424242 gr/in3 × 0.002357142857 = 0.9999999999 st/gal
424.2424242 grain per cubic inches = 0.9999999999 stones per gallon.
stones per gallon = grain per cubic inches × 0.00235714285714
For a page dedicated to this direction, see Grain per Cubic inch to Stone per Gallon.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Understanding the Grain per Cubic inch (gr/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grain per cubic inches are in 1 stone per gallon?
1 stone per gallon equals 424.2424242 grain per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert stone per gallon to grain per cubic inch?
Multiply the stone per gallon value by 424.2424242. The converter above does this instantly to whatever precision you set.
How do I convert grain per cubic inch back to stone per gallon?
Use the reverse factor: 1 grain per cubic inch equals 0.0023571429 stones per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
What is a grain per cubic inch?
Grain per Cubic inch (gr/in3) is a unit of density.
Is the stone per gallon to grain per cubic inch conversion exact?
Yes. Both stone per gallon and grain per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 424.2424242 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.