Mass per volume density.
Grains per Pint to Stone per Cubic inches Converter — gr/pt to st/in3
Convert Grain per Pint (gr/pt) to Stone per Cubic inch (st/in3) using the exact conversion factor (1 grain per pint = 3.533881e-7 stone per cubic inch). See the formula, worked examples, and conversion table.
Grains per Pint 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 0.1369444884 / 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 Pint to Stone per Cubic inches
Grain per Pint 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 pint × 3.533881e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per pint equals 0.136944488362 base units, and 1 stone per cubic inch equals 387518.665943 base units, so dividing one by the other gives the direct grain per pint-to-stone per cubic inch factor of 3.533881e-7.
Simple example
1 gr/pt × 3.533881e-7 = 3.533881e-7 st/in3
1 grain per pint = 3.533881e-7 stone per cubic inches.
Real-world example
1,000 gr/pt × 3.533881e-7 = 0.0003533881 st/in3
1,000 grains per pint = 0.0003533881 stone per cubic inches.
Conversion table
| Grain per Pint (gr/pt) | Stone per Cubic inch (st/in3) |
|---|---|
| 0.1 gr/pt | 3.533881e-8 st/in3 |
| 1 gr/pt | 3.533881e-7 st/in3 |
| 10 gr/pt | 0.0000035339 st/in3 |
| 100 gr/pt | 0.0000353388 st/in3 |
| 1,000 gr/pt | 0.0003533881 st/in3 |
| 10,000 gr/pt | 0.0035338811 st/in3 |
Reverse conversion: Stone per Cubic inch to Grain per Pint
3.533881e-7 st/in3 × 2829750 = 0.999999976 gr/pt
3.533881e-7 stone per cubic inches = 0.999999976 grains per pint.
grains per pint = stone per cubic inches × 2829750
For a page dedicated to this direction, see Stone per Cubic inch to Grain per Pint.
Understanding the Grain per Pint (gr/pt)
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 pint?
1 grain per pint equals 3.533881e-7 stone per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert grain per pint to stone per cubic inch?
Multiply the grain per pint value by 3.533881e-7. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic inch back to grain per pint?
Use the reverse factor: 1 stone per cubic inch equals 2,829,750 grains per pint. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per pint?
Grain per Pint (gr/pt) 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 pint to stone per cubic inch conversion exact?
Yes. Both grain per pint and stone per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 3.533881e-7 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.