Mass per volume density.
Pounds per Cup to Stones per Imperial gallon Converter — lb/cup to st/imp gal
Convert Pound per Cup (lb/cup) to Stone per Imperial gallon (st/imp gal) using the exact conversion factor (1 pound per cup = 1.372514201 stone per imperial gallon). See the formula, worked examples, and conversion table.
Pounds per Cup to Stones per Imperial 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 / 1396.869217.
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 Stones per Imperial gallon
Pound per Cup and Stone per Imperial 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
stones per imperial gallon = pounds per cup × 1.37251420058
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 stone per imperial gallon equals 1396.86921728 base units, so dividing one by the other gives the direct pound per cup-to-stone per imperial gallon factor of 1.37251420058.
Simple example
1 lb/cup × 1.372514201 = 1.372514201 st/imp gal
1 pound per cup = 1.372514201 stones per imperial gallon.
Real-world example
1,000 lb/cup × 1.372514201 = 1,372.514201 st/imp gal
1,000 pounds per cup = 1,372.514201 stones per imperial gallon.
Conversion table
| Pound per Cup (lb/cup) | Stone per Imperial gallon (st/imp gal) |
|---|---|
| 0.1 lb/cup | 0.1372514201 st/imp gal |
| 1 lb/cup | 1.372514201 st/imp gal |
| 10 lb/cup | 13.72514201 st/imp gal |
| 100 lb/cup | 137.2514201 st/imp gal |
| 1,000 lb/cup | 1,372.514201 st/imp gal |
| 10,000 lb/cup | 13,725.14201 st/imp gal |
Reverse conversion: Stone per Imperial gallon to Pound per Cup
1.372514201 st/imp gal × 0.7285899116 = 1 lb/cup
1.372514201 stones per imperial gallon = 1 pounds per cup.
pounds per cup = stones per imperial gallon × 0.72858991155
For a page dedicated to this direction, see Stone per Imperial gallon to Pound per Cup.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Understanding the Stone per Imperial gallon (st/imp gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per imperial gallon are in 1 pound per cup?
1 pound per cup equals 1.372514201 stones per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cup to stone per imperial gallon?
Multiply the pound per cup value by 1.372514201. The converter above does this instantly to whatever precision you set.
How do I convert stone per imperial gallon back to pound per cup?
Use the reverse factor: 1 stone per imperial gallon equals 0.7285899116 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 stone per imperial gallon?
Stone per Imperial gallon (st/imp gal) is a unit of density.
Is the pound per cup to stone per imperial gallon conversion exact?
Yes. Both pound per cup and stone per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 1.372514201 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.