Mass per volume density.
Grains per Cup to Stones per Pint Converter — gr/cup to st/pt
Convert Grain per Cup (gr/cup) to Stone per Pint (st/pt) using the exact conversion factor (1 grain per cup = 0.0000204082 stone per pint). See the formula, worked examples, and conversion table.
Grains per Cup to Stones per Pint 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 0.2738889767 / 13420.55986.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Cup to Stones per Pint
Grain per Cup and Stone per Pint 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 pint = grains per cup × 0.0000204081632653
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per cup equals 0.273888976724 base units, and 1 stone per pint equals 13420.5598595 base units, so dividing one by the other gives the direct grain per cup-to-stone per pint factor of 0.0000204081632653.
Simple example
1 gr/cup × 0.00002040816327 = 0.0000204082 st/pt
1 grain per cup = 0.0000204082 stones per pint.
Real-world example
1,000 gr/cup × 0.00002040816327 = 0.0204081633 st/pt
1,000 grains per cup = 0.0204081633 stones per pint.
Conversion table
| Grain per Cup (gr/cup) | Stone per Pint (st/pt) |
|---|---|
| 0.1 gr/cup | 0.0000020408 st/pt |
| 1 gr/cup | 0.0000204082 st/pt |
| 10 gr/cup | 0.0002040816 st/pt |
| 100 gr/cup | 0.0020408163 st/pt |
| 1,000 gr/cup | 0.0204081633 st/pt |
| 10,000 gr/cup | 0.2040816327 st/pt |
Reverse conversion: Stone per Pint to Grain per Cup
0.0000204082 st/pt × 49000 = 1.0000018 gr/cup
0.0000204082 stones per pint = 1.0000018 grains per cup.
grains per cup = stones per pint × 49000
For a page dedicated to this direction, see Stone per Pint to Grain per Cup.
Understanding the Grain per Cup (gr/cup)
Mass per volume density.
Understanding the Stone per Pint (st/pt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per pint are in 1 grain per cup?
1 grain per cup equals 0.0000204082 stones per pint, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cup to stone per pint?
Multiply the grain per cup value by 0.00002040816327. The converter above does this instantly to whatever precision you set.
How do I convert stone per pint back to grain per cup?
Use the reverse factor: 1 stone per pint equals 49,000 grains per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per cup?
Grain per Cup (gr/cup) is a unit of density.
What is a stone per pint?
Stone per Pint (st/pt) is a unit of density.
Is the grain per cup to stone per pint conversion exact?
Yes. Both grain per cup and stone per pint are defined by fixed standards rather than physical artifacts, so the factor of 0.00002040816327 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.