Mass per volume density.
Slugs per Cup to Pounds per Quart Converter — slug/cup to lb/qt
Convert Slug per Cup (slug/cup) to Pound per Quart (lb/qt) using the exact conversion factor (1 slug per cup = 128.6961942 pound per quart). See the formula, worked examples, and conversion table.
Slugs per Cup to Pounds per Quart 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 61684.82065 / 479.3057093.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Slugs per Cup to Pounds per Quart
Slug per Cup and Pound per Quart 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 quart = slugs per cup × 128.696194226
This factor comes from each unit's defined relationship to the category's base unit: 1 slug per cup equals 61684.8206534 base units, and 1 pound per quart equals 479.305709268 base units, so dividing one by the other gives the direct slug per cup-to-pound per quart factor of 128.696194226.
Simple example
1 slug/cup × 128.6961942 = 128.6961942 lb/qt
1 slug per cup = 128.6961942 pounds per quart.
Real-world example
1,000 slug/cup × 128.6961942 = 128,696.1942 lb/qt
1,000 slugs per cup = 128,696.1942 pounds per quart.
Conversion table
| Slug per Cup (slug/cup) | Pound per Quart (lb/qt) |
|---|---|
| 0.1 slug/cup | 12.86961942 lb/qt |
| 1 slug/cup | 128.6961942 lb/qt |
| 10 slug/cup | 1,286.961942 lb/qt |
| 100 slug/cup | 12,869.61942 lb/qt |
| 1,000 slug/cup | 128,696.1942 lb/qt |
| 10,000 slug/cup | 1,286,961.942 lb/qt |
Reverse conversion: Pound per Quart to Slug per Cup
128.6961942 lb/qt × 0.007770237543 = 0.9999999998 slug/cup
128.6961942 pounds per quart = 0.9999999998 slugs per cup.
slugs per cup = pounds per quart × 0.0077702375429
For a page dedicated to this direction, see Pound per Quart to Slug per Cup.
Understanding the Slug per Cup (slug/cup)
Mass per volume density.
Understanding the Pound per Quart (lb/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per quart are in 1 slug per cup?
1 slug per cup equals 128.6961942 pounds per quart, using the exact defined conversion factor rather than an estimate.
How do I convert slug per cup to pound per quart?
Multiply the slug per cup value by 128.6961942. The converter above does this instantly to whatever precision you set.
How do I convert pound per quart back to slug per cup?
Use the reverse factor: 1 pound per quart equals 0.0077702375 slugs per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a slug per cup?
Slug per Cup (slug/cup) is a unit of density.
What is a pound per quart?
Pound per Quart (lb/qt) is a unit of density.
Is the slug per cup to pound per quart conversion exact?
Yes. Both slug per cup and pound per quart are defined by fixed standards rather than physical artifacts, so the factor of 128.6961942 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.