Mass per volume density.
Grains per Cup to Slug per Cubic inches Converter — gr/cup to slug/in3
Convert Grain per Cup (gr/cup) to Slug per Cubic inch (slug/in3) using the exact conversion factor (1 grain per cup = 3.075419e-7 slug per cubic inch). See the formula, worked examples, and conversion table.
Grains per Cup to Slug 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 0.2738889767 / 890574.5982.
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 Slug per Cubic inches
Grain per Cup and Slug 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
slug per cubic inches = grains per cup × 3.075419e-7
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 slug per cubic inch equals 890574.598183 base units, so dividing one by the other gives the direct grain per cup-to-slug per cubic inch factor of 3.075419e-7.
Simple example
1 gr/cup × 3.075419e-7 = 3.075419e-7 slug/in3
1 grain per cup = 3.075419e-7 slug per cubic inches.
Real-world example
1,000 gr/cup × 3.075419e-7 = 0.0003075419 slug/in3
1,000 grains per cup = 0.0003075419 slug per cubic inches.
Conversion table
| Grain per Cup (gr/cup) | Slug per Cubic inch (slug/in3) |
|---|---|
| 0.1 gr/cup | 3.075419e-8 slug/in3 |
| 1 gr/cup | 3.075419e-7 slug/in3 |
| 10 gr/cup | 0.0000030754 slug/in3 |
| 100 gr/cup | 0.0000307542 slug/in3 |
| 1,000 gr/cup | 0.0003075419 slug/in3 |
| 10,000 gr/cup | 0.0030754187 slug/in3 |
Reverse conversion: Slug per Cubic inch to Grain per Cup
3.075419e-7 slug/in3 × 3251589.782 = 1.0000001 gr/cup
3.075419e-7 slug per cubic inches = 1.0000001 grains per cup.
grains per cup = slug per cubic inches × 3251589.78223
For a page dedicated to this direction, see Slug per Cubic inch to Grain per Cup.
Understanding the Grain per Cup (gr/cup)
Mass per volume density.
Understanding the Slug per Cubic inch (slug/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many slug per cubic inches are in 1 grain per cup?
1 grain per cup equals 3.075419e-7 slug per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cup to slug per cubic inch?
Multiply the grain per cup value by 3.075419e-7. The converter above does this instantly to whatever precision you set.
How do I convert slug per cubic inch back to grain per cup?
Use the reverse factor: 1 slug per cubic inch equals 3,251,589.782 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 slug per cubic inch?
Slug per Cubic inch (slug/in3) is a unit of density.
Is the grain per cup to slug per cubic inch conversion exact?
Yes. Both grain per cup and slug per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 3.075419e-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.