Mass per volume density.
Grain per Cubic inches to Slugs per Cup Converter — gr/in3 to slug/cup
Convert Grain per Cubic inch (gr/in3) to Slug per Cup (slug/cup) using the exact conversion factor (1 grain per cubic inch = 0.0000641045 slug per cup). See the formula, worked examples, and conversion table.
Grain per Cubic inches to Slugs 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 / 61684.82065.
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 Slugs per Cup
Grain per Cubic inch and Slug 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
slugs per cup = grain per cubic inches × 0.0000641044597289
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 slug per cup equals 61684.8206534 base units, so dividing one by the other gives the direct grain per cubic inch-to-slug per cup factor of 0.0000641044597289.
Simple example
1 gr/in3 × 0.00006410445973 = 0.0000641045 slug/cup
1 grain per cubic inch = 0.0000641045 slugs per cup.
Real-world example
1,000 gr/in3 × 0.00006410445973 = 0.0641044597 slug/cup
1,000 grain per cubic inches = 0.0641044597 slugs per cup.
Conversion table
| Grain per Cubic inch (gr/in3) | Slug per Cup (slug/cup) |
|---|---|
| 0.1 gr/in3 | 0.0000064104 slug/cup |
| 1 gr/in3 | 0.0000641045 slug/cup |
| 10 gr/in3 | 0.0006410446 slug/cup |
| 100 gr/in3 | 0.006410446 slug/cup |
| 1,000 gr/in3 | 0.0641044597 slug/cup |
| 10,000 gr/in3 | 0.6410445973 slug/cup |
Reverse conversion: Slug per Cup to Grain per Cubic inch
0.0000641045 slug/cup × 15599.53869 = 1.000000628 gr/in3
0.0000641045 slugs per cup = 1.000000628 grain per cubic inches.
grain per cubic inches = slugs per cup × 15599.538694
For a page dedicated to this direction, see Slug per Cup to Grain per Cubic inch.
Understanding the Grain per Cubic inch (gr/in3)
Mass per volume density.
Understanding the Slug per Cup (slug/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many slugs per cup are in 1 grain per cubic inch?
1 grain per cubic inch equals 0.0000641045 slugs per cup, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cubic inch to slug per cup?
Multiply the grain per cubic inch value by 0.00006410445973. The converter above does this instantly to whatever precision you set.
How do I convert slug per cup back to grain per cubic inch?
Use the reverse factor: 1 slug per cup equals 15,599.53869 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 slug per cup?
Slug per Cup (slug/cup) is a unit of density.
Is the grain per cubic inch to slug per cup conversion exact?
Yes. Both grain per cubic inch and slug per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.00006410445973 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.