Mass per volume density.
Pounds per Imperial gallon to Stones per Cup Converter — lb/imp gal to st/cup
Convert Pound per Imperial gallon (lb/imp gal) to Stone per Cup (st/cup) using the exact conversion factor (1 pound per imperial gallon = 0.0037172955 stone per cup). See the formula, worked examples, and conversion table.
Pounds per Imperial gallon to Stones 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 99.77637266 / 26841.11972.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Imperial gallon to Stones per Cup
Pound per Imperial gallon and Stone 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
stones per cup = pounds per imperial gallon × 0.00371729546709
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per imperial gallon equals 99.7763726631 base units, and 1 stone per cup equals 26841.119719 base units, so dividing one by the other gives the direct pound per imperial gallon-to-stone per cup factor of 0.00371729546709.
Simple example
1 lb/imp gal × 0.003717295467 = 0.0037172955 st/cup
1 pound per imperial gallon = 0.0037172955 stones per cup.
Real-world example
1,000 lb/imp gal × 0.003717295467 = 3.717295467 st/cup
1,000 pounds per imperial gallon = 3.717295467 stones per cup.
Conversion table
| Pound per Imperial gallon (lb/imp gal) | Stone per Cup (st/cup) |
|---|---|
| 0.1 lb/imp gal | 0.0003717295 st/cup |
| 1 lb/imp gal | 0.0037172955 st/cup |
| 10 lb/imp gal | 0.0371729547 st/cup |
| 100 lb/imp gal | 0.3717295467 st/cup |
| 1,000 lb/imp gal | 3.717295467 st/cup |
| 10,000 lb/imp gal | 37.17295467 st/cup |
Reverse conversion: Stone per Cup to Pound per Imperial gallon
0.0037172955 st/cup × 269.0127833 = 1.000000009 lb/imp gal
0.0037172955 stones per cup = 1.000000009 pounds per imperial gallon.
pounds per imperial gallon = stones per cup × 269.012783313
For a page dedicated to this direction, see Stone per Cup to Pound per Imperial gallon.
Understanding the Pound per Imperial gallon (lb/imp gal)
Mass per volume density.
Understanding the Stone per Cup (st/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cup are in 1 pound per imperial gallon?
1 pound per imperial gallon equals 0.0037172955 stones per cup, using the exact defined conversion factor rather than an estimate.
How do I convert pound per imperial gallon to stone per cup?
Multiply the pound per imperial gallon value by 0.003717295467. The converter above does this instantly to whatever precision you set.
How do I convert stone per cup back to pound per imperial gallon?
Use the reverse factor: 1 stone per cup equals 269.0127833 pounds per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per imperial gallon?
Pound per Imperial gallon (lb/imp gal) is a unit of density.
What is a stone per cup?
Stone per Cup (st/cup) is a unit of density.
Is the pound per imperial gallon to stone per cup conversion exact?
Yes. Both pound per imperial gallon and stone per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.003717295467 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.