Mass per volume density.
Slugs per Fluid ounce to Pounds per Cup Converter — slug/fl oz to lb/cup
Convert Slug per Fluid ounce (slug/fl oz) to Pound per Cup (lb/cup) using the exact conversion factor (1 slug per fluid ounce = 257.3923885 pound per cup). See the formula, worked examples, and conversion table.
Slugs per Fluid ounce 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 493478.5652 / 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 Fluid ounce to Pounds per Cup
Slug per Fluid ounce 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 fluid ounce × 257.392388451
This factor comes from each unit's defined relationship to the category's base unit: 1 slug per fluid ounce equals 493478.565227 base units, and 1 pound per cup equals 1917.22283707 base units, so dividing one by the other gives the direct slug per fluid ounce-to-pound per cup factor of 257.392388451.
Simple example
1 slug/fl oz × 257.3923885 = 257.3923885 lb/cup
1 slug per fluid ounce = 257.3923885 pounds per cup.
Real-world example
1,000 slug/fl oz × 257.3923885 = 257,392.3885 lb/cup
1,000 slugs per fluid ounce = 257,392.3885 pounds per cup.
Conversion table
| Slug per Fluid ounce (slug/fl oz) | Pound per Cup (lb/cup) |
|---|---|
| 0.1 slug/fl oz | 25.73923885 lb/cup |
| 1 slug/fl oz | 257.3923885 lb/cup |
| 10 slug/fl oz | 2,573.923885 lb/cup |
| 100 slug/fl oz | 25,739.23885 lb/cup |
| 1,000 slug/fl oz | 257,392.3885 lb/cup |
| 10,000 slug/fl oz | 2,573,923.885 lb/cup |
Reverse conversion: Pound per Cup to Slug per Fluid ounce
257.3923885 lb/cup × 0.003885118771 = 1 slug/fl oz
257.3923885 pounds per cup = 1 slugs per fluid ounce.
slugs per fluid ounce = pounds per cup × 0.00388511877145
For a page dedicated to this direction, see Pound per Cup to Slug per Fluid ounce.
Understanding the Slug per Fluid ounce (slug/fl oz)
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 fluid ounce?
1 slug per fluid ounce equals 257.3923885 pounds per cup, using the exact defined conversion factor rather than an estimate.
How do I convert slug per fluid ounce to pound per cup?
Multiply the slug per fluid ounce value by 257.3923885. The converter above does this instantly to whatever precision you set.
How do I convert pound per cup back to slug per fluid ounce?
Use the reverse factor: 1 pound per cup equals 0.0038851188 slugs per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a slug per fluid ounce?
Slug per Fluid ounce (slug/fl oz) 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 fluid ounce to pound per cup conversion exact?
Yes. Both slug per fluid ounce and pound per cup are defined by fixed standards rather than physical artifacts, so the factor of 257.3923885 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.