Mass per volume density.
Pounds per Cup to Slugs per Cubic foot Converter — lb/cup to slug/ft3
Convert Pound per Cup (lb/cup) to Slug per Cubic foot (slug/ft3) using the exact conversion factor (1 pound per cup = 3.720026452 slug per cubic foot). See the formula, worked examples, and conversion table.
Pounds per Cup to Slugs per Cubic foot 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 / 515.3788184.
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 Slugs per Cubic foot
Pound per Cup and Slug per Cubic foot 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 cubic foot = pounds per cup × 3.72002645171
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 foot equals 515.378818393 base units, so dividing one by the other gives the direct pound per cup-to-slug per cubic foot factor of 3.72002645171.
Simple example
1 lb/cup × 3.720026452 = 3.720026452 slug/ft3
1 pound per cup = 3.720026452 slugs per cubic foot.
Real-world example
1,000 lb/cup × 3.720026452 = 3,720.026452 slug/ft3
1,000 pounds per cup = 3,720.026452 slugs per cubic foot.
Conversion table
| Pound per Cup (lb/cup) | Slug per Cubic foot (slug/ft3) |
|---|---|
| 0.1 lb/cup | 0.3720026452 slug/ft3 |
| 1 lb/cup | 3.720026452 slug/ft3 |
| 10 lb/cup | 37.20026452 slug/ft3 |
| 100 lb/cup | 372.0026452 slug/ft3 |
| 1,000 lb/cup | 3,720.026452 slug/ft3 |
| 10,000 lb/cup | 37,200.26452 slug/ft3 |
Reverse conversion: Slug per Cubic foot to Pound per Cup
3.720026452 slug/ft3 × 0.2688152928 = 1 lb/cup
3.720026452 slugs per cubic foot = 1 pounds per cup.
pounds per cup = slugs per cubic foot × 0.268815292843
For a page dedicated to this direction, see Slug per Cubic foot to Pound per Cup.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Understanding the Slug per Cubic foot (slug/ft3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many slugs per cubic foot are in 1 pound per cup?
1 pound per cup equals 3.720026452 slugs per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cup to slug per cubic foot?
Multiply the pound per cup value by 3.720026452. The converter above does this instantly to whatever precision you set.
How do I convert slug per cubic foot back to pound per cup?
Use the reverse factor: 1 slug per cubic foot equals 0.2688152928 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 foot?
Slug per Cubic foot (slug/ft3) is a unit of density.
Is the pound per cup to slug per cubic foot conversion exact?
Yes. Both pound per cup and slug per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 3.720026452 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.