Mass per volume density.
Stones per Fluid ounce to Pounds per Cup Converter — st/fl oz to lb/cup
Convert Stone per Fluid ounce (st/fl oz) to Pound per Cup (lb/cup) using the exact conversion factor (1 stone per fluid ounce = 112 pound per cup). See the formula, worked examples, and conversion table.
Stones 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 214728.9578 / 1917.222837.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Fluid ounce to Pounds per Cup
Stone 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 = stones per fluid ounce × 112
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per fluid ounce equals 214728.957752 base units, and 1 pound per cup equals 1917.22283707 base units, so dividing one by the other gives the direct stone per fluid ounce-to-pound per cup factor of 112.
Simple example
1 st/fl oz × 112 = 112 lb/cup
1 stone per fluid ounce = 112 pounds per cup.
Real-world example
1,000 st/fl oz × 112 = 112,000 lb/cup
1,000 stones per fluid ounce = 112,000 pounds per cup.
Conversion table
| Stone per Fluid ounce (st/fl oz) | Pound per Cup (lb/cup) |
|---|---|
| 0.1 st/fl oz | 11.2 lb/cup |
| 1 st/fl oz | 112 lb/cup |
| 10 st/fl oz | 1,120 lb/cup |
| 100 st/fl oz | 11,200 lb/cup |
| 1,000 st/fl oz | 112,000 lb/cup |
| 10,000 st/fl oz | 1,120,000 lb/cup |
Reverse conversion: Pound per Cup to Stone per Fluid ounce
112 lb/cup × 0.008928571429 = 1 st/fl oz
112 pounds per cup = 1 stone per fluid ounce.
stones per fluid ounce = pounds per cup × 0.00892857142857
For a page dedicated to this direction, see Pound per Cup to Stone per Fluid ounce.
Understanding the Stone per Fluid ounce (st/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 stone per fluid ounce?
1 stone per fluid ounce equals 112 pounds per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per fluid ounce to pound per cup?
Multiply the stone per fluid ounce value by 112. The converter above does this instantly to whatever precision you set.
How do I convert pound per cup back to stone per fluid ounce?
Use the reverse factor: 1 pound per cup equals 0.0089285714 stones per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per fluid ounce?
Stone per Fluid ounce (st/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 stone per fluid ounce to pound per cup conversion exact?
Yes. Both stone per fluid ounce and pound per cup are defined by fixed standards rather than physical artifacts, so the factor of 112 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.