Mass per volume density.
Slugs per Cubic foot to Pounds per Cup Converter — slug/ft3 to lb/cup
Convert Slug per Cubic foot (slug/ft3) to Pound per Cup (lb/cup) using the exact conversion factor (1 slug per cubic foot = 0.2688152928 pound per cup). See the formula, worked examples, and conversion table.
Slugs per Cubic foot to Pounds 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 515.3788184 / 1917.222837.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Slugs per Cubic foot to Pounds per Cup
Slug per Cubic foot and Pound 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
pounds per cup = slugs per cubic foot × 0.268815292843
This factor comes from each unit's defined relationship to the category's base unit: 1 slug per cubic foot equals 515.378818393 base units, and 1 pound per cup equals 1917.22283707 base units, so dividing one by the other gives the direct slug per cubic foot-to-pound per cup factor of 0.268815292843.
Simple example
1 slug/ft3 × 0.2688152928 = 0.2688152928 lb/cup
1 slug per cubic foot = 0.2688152928 pounds per cup.
Real-world example
1,000 slug/ft3 × 0.2688152928 = 268.8152928 lb/cup
1,000 slugs per cubic foot = 268.8152928 pounds per cup.
Conversion table
| Slug per Cubic foot (slug/ft3) | Pound per Cup (lb/cup) |
|---|---|
| 0.1 slug/ft3 | 0.0268815293 lb/cup |
| 1 slug/ft3 | 0.2688152928 lb/cup |
| 10 slug/ft3 | 2.688152928 lb/cup |
| 100 slug/ft3 | 26.88152928 lb/cup |
| 1,000 slug/ft3 | 268.8152928 lb/cup |
| 10,000 slug/ft3 | 2,688.152928 lb/cup |
Reverse conversion: Pound per Cup to Slug per Cubic foot
0.2688152928 lb/cup × 3.720026452 = 0.9999999998 slug/ft3
0.2688152928 pounds per cup = 0.9999999998 slugs per cubic foot.
slugs per cubic foot = pounds per cup × 3.72002645171
For a page dedicated to this direction, see Pound per Cup to Slug per Cubic foot.
Understanding the Slug per Cubic foot (slug/ft3)
Mass per volume density.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per cup are in 1 slug per cubic foot?
1 slug per cubic foot equals 0.2688152928 pounds per cup, using the exact defined conversion factor rather than an estimate.
How do I convert slug per cubic foot to pound per cup?
Multiply the slug per cubic foot value by 0.2688152928. The converter above does this instantly to whatever precision you set.
How do I convert pound per cup back to slug per cubic foot?
Use the reverse factor: 1 pound per cup equals 3.720026452 slugs per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a slug per cubic foot?
Slug per Cubic foot (slug/ft3) is a unit of density.
What is a pound per cup?
Pound per Cup (lb/cup) is a unit of density.
Is the slug per cubic foot to pound per cup conversion exact?
Yes. Both slug per cubic foot and pound per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.2688152928 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.