Mass per volume density.
Grains per Imperial gallon to Stone per Cubic inches Converter — gr/imp gal to st/in3
Convert Grain per Imperial gallon (gr/imp gal) to Stone per Cubic inch (st/in3) using the exact conversion factor (1 grain per imperial gallon = 3.678214e-8 stone per cubic inch). See the formula, worked examples, and conversion table.
Grains per Imperial gallon to Stone 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 0.01425376752 / 387518.6659.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Imperial gallon to Stone per Cubic inches
Grain per Imperial gallon and Stone 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
stone per cubic inches = grains per imperial gallon × 3.678214e-8
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per imperial gallon equals 0.0142537675233 base units, and 1 stone per cubic inch equals 387518.665943 base units, so dividing one by the other gives the direct grain per imperial gallon-to-stone per cubic inch factor of 3.678214e-8.
Simple example
1 gr/imp gal × 3.678214e-8 = 3.678214e-8 st/in3
1 grain per imperial gallon = 3.678214e-8 stone per cubic inches.
Real-world example
1,000 gr/imp gal × 3.678214e-8 = 0.0000367821 st/in3
1,000 grains per imperial gallon = 0.0000367821 stone per cubic inches.
Conversion table
| Grain per Imperial gallon (gr/imp gal) | Stone per Cubic inch (st/in3) |
|---|---|
| 0.1 gr/imp gal | 3.678214e-9 st/in3 |
| 1 gr/imp gal | 3.678214e-8 st/in3 |
| 10 gr/imp gal | 3.678214e-7 st/in3 |
| 100 gr/imp gal | 0.0000036782 st/in3 |
| 1,000 gr/imp gal | 0.0000367821 st/in3 |
| 10,000 gr/imp gal | 0.0003678214 st/in3 |
Reverse conversion: Stone per Cubic inch to Grain per Imperial gallon
3.678214e-8 st/in3 × 27187104.41 = 0.9999998807 gr/imp gal
3.678214e-8 stone per cubic inches = 0.9999998807 grains per imperial gallon.
grains per imperial gallon = stone per cubic inches × 27187104.4136
For a page dedicated to this direction, see Stone per Cubic inch to Grain per Imperial gallon.
Understanding the Grain per Imperial gallon (gr/imp gal)
Mass per volume density.
Understanding the Stone per Cubic inch (st/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stone per cubic inches are in 1 grain per imperial gallon?
1 grain per imperial gallon equals 3.678214e-8 stone per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert grain per imperial gallon to stone per cubic inch?
Multiply the grain per imperial gallon value by 3.678214e-8. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic inch back to grain per imperial gallon?
Use the reverse factor: 1 stone per cubic inch equals 27,187,104.41 grains per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per imperial gallon?
Grain per Imperial gallon (gr/imp gal) is a unit of density.
What is a stone per cubic inch?
Stone per Cubic inch (st/in3) is a unit of density.
Is the grain per imperial gallon to stone per cubic inch conversion exact?
Yes. Both grain per imperial gallon and stone per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 3.678214e-8 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.