Mass per volume density.
Pounds per Cup to Slugs per Gallon Converter — lb/cup to slug/gal
Convert Pound per Cup (lb/cup) to Slug per Gallon (slug/gal) using the exact conversion factor (1 pound per cup = 0.4972952027 slug per gallon). See the formula, worked examples, and conversion table.
Pounds per Cup to Slugs per Gallon 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 / 3855.301291.
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 Gallon
Pound per Cup and Slug per Gallon 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 gallon = pounds per cup × 0.497295202745
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 gallon equals 3855.30129084 base units, so dividing one by the other gives the direct pound per cup-to-slug per gallon factor of 0.497295202745.
Simple example
1 lb/cup × 0.4972952027 = 0.4972952027 slug/gal
1 pound per cup = 0.4972952027 slugs per gallon.
Real-world example
1,000 lb/cup × 0.4972952027 = 497.2952027 slug/gal
1,000 pounds per cup = 497.2952027 slugs per gallon.
Conversion table
| Pound per Cup (lb/cup) | Slug per Gallon (slug/gal) |
|---|---|
| 0.1 lb/cup | 0.0497295203 slug/gal |
| 1 lb/cup | 0.4972952027 slug/gal |
| 10 lb/cup | 4.972952027 slug/gal |
| 100 lb/cup | 49.72952027 slug/gal |
| 1,000 lb/cup | 497.2952027 slug/gal |
| 10,000 lb/cup | 4,972.952027 slug/gal |
Reverse conversion: Slug per Gallon to Pound per Cup
0.4972952027 slug/gal × 2.010878035 = 0.9999999999 lb/cup
0.4972952027 slugs per gallon = 0.9999999999 pounds per cup.
pounds per cup = slugs per gallon × 2.01087803478
For a page dedicated to this direction, see Slug per Gallon to Pound per Cup.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Understanding the Slug per Gallon (slug/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many slugs per gallon are in 1 pound per cup?
1 pound per cup equals 0.4972952027 slugs per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cup to slug per gallon?
Multiply the pound per cup value by 0.4972952027. The converter above does this instantly to whatever precision you set.
How do I convert slug per gallon back to pound per cup?
Use the reverse factor: 1 slug per gallon equals 2.010878035 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 gallon?
Slug per Gallon (slug/gal) is a unit of density.
Is the pound per cup to slug per gallon conversion exact?
Yes. Both pound per cup and slug per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.4972952027 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.