Mass per volume density.
Pounds per Cup to Slug per Cubic inches Converter — lb/cup to slug/in3
Convert Pound per Cup (lb/cup) to Slug per Cubic inch (slug/in3) using the exact conversion factor (1 pound per cup = 0.0021527931 slug per cubic inch). See the formula, worked examples, and conversion table.
Pounds 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 1917.222837 / 890574.5982.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cup to Slug per Cubic inches
Pound 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 = pounds per cup × 0.00215279308548
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cup equals 1917.22283707 base units, and 1 slug per cubic inch equals 890574.598183 base units, so dividing one by the other gives the direct pound per cup-to-slug per cubic inch factor of 0.00215279308548.
Simple example
1 lb/cup × 0.002152793085 = 0.0021527931 slug/in3
1 pound per cup = 0.0021527931 slug per cubic inches.
Real-world example
1,000 lb/cup × 0.002152793085 = 2.152793085 slug/in3
1,000 pounds per cup = 2.152793085 slug per cubic inches.
Conversion table
| Pound per Cup (lb/cup) | Slug per Cubic inch (slug/in3) |
|---|---|
| 0.1 lb/cup | 0.0002152793 slug/in3 |
| 1 lb/cup | 0.0021527931 slug/in3 |
| 10 lb/cup | 0.0215279309 slug/in3 |
| 100 lb/cup | 0.2152793085 slug/in3 |
| 1,000 lb/cup | 2.152793085 slug/in3 |
| 10,000 lb/cup | 21.52793085 slug/in3 |
Reverse conversion: Slug per Cubic inch to Pound per Cup
0.0021527931 slug/in3 × 464.512826 = 1.000000007 lb/cup
0.0021527931 slug per cubic inches = 1.000000007 pounds per cup.
pounds per cup = slug per cubic inches × 464.512826033
For a page dedicated to this direction, see Slug per Cubic inch to Pound per Cup.
Understanding the Pound per Cup (lb/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 pound per cup?
1 pound per cup equals 0.0021527931 slug per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cup to slug per cubic inch?
Multiply the pound per cup value by 0.002152793085. The converter above does this instantly to whatever precision you set.
How do I convert slug per cubic inch back to pound per cup?
Use the reverse factor: 1 slug per cubic inch equals 464.512826 pounds per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cup?
Pound per Cup (lb/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 pound per cup to slug per cubic inch conversion exact?
Yes. Both pound per cup and slug per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.002152793085 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.