Mass per volume density.
Grain per Cubic inches to Stones per Cup Converter — gr/in3 to st/cup
Convert Grain per Cubic inch (gr/in3) to Stone per Cup (st/cup) using the exact conversion factor (1 grain per cubic inch = 0.0001473214 stone per cup). See the formula, worked examples, and conversion table.
Grain per Cubic inches to Stones per Cup 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 3.954272101 / 26841.11972.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grain per Cubic inches to Stones per Cup
Grain per Cubic inch and Stone per Cup 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
stones per cup = grain per cubic inches × 0.000147321428571
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per cubic inch equals 3.95427210146 base units, and 1 stone per cup equals 26841.119719 base units, so dividing one by the other gives the direct grain per cubic inch-to-stone per cup factor of 0.000147321428571.
Simple example
1 gr/in3 × 0.0001473214286 = 0.0001473214 st/cup
1 grain per cubic inch = 0.0001473214 stones per cup.
Real-world example
1,000 gr/in3 × 0.0001473214286 = 0.1473214286 st/cup
1,000 grain per cubic inches = 0.1473214286 stones per cup.
Conversion table
| Grain per Cubic inch (gr/in3) | Stone per Cup (st/cup) |
|---|---|
| 0.1 gr/in3 | 0.0000147321 st/cup |
| 1 gr/in3 | 0.0001473214 st/cup |
| 10 gr/in3 | 0.0014732143 st/cup |
| 100 gr/in3 | 0.0147321429 st/cup |
| 1,000 gr/in3 | 0.1473214286 st/cup |
| 10,000 gr/in3 | 1.473214286 st/cup |
Reverse conversion: Stone per Cup to Grain per Cubic inch
0.0001473214 st/cup × 6787.878788 = 0.9999998061 gr/in3
0.0001473214 stones per cup = 0.9999998061 grain per cubic inches.
grain per cubic inches = stones per cup × 6787.87878788
For a page dedicated to this direction, see Stone per Cup to Grain per Cubic inch.
Understanding the Grain per Cubic inch (gr/in3)
Mass per volume density.
Understanding the Stone per Cup (st/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cup are in 1 grain per cubic inch?
1 grain per cubic inch equals 0.0001473214 stones per cup, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cubic inch to stone per cup?
Multiply the grain per cubic inch value by 0.0001473214286. The converter above does this instantly to whatever precision you set.
How do I convert stone per cup back to grain per cubic inch?
Use the reverse factor: 1 stone per cup equals 6,787.878788 grain per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per cubic inch?
Grain per Cubic inch (gr/in3) is a unit of density.
What is a stone per cup?
Stone per Cup (st/cup) is a unit of density.
Is the grain per cubic inch to stone per cup conversion exact?
Yes. Both grain per cubic inch and stone per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.0001473214286 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.