Mass per volume density.
Pounds per Cup to Pounds per Imperial gallon Converter — lb/cup to lb/imp gal
Convert Pound per Cup (lb/cup) to Pound per Imperial gallon (lb/imp gal) using the exact conversion factor (1 pound per cup = 19.21519881 pound per imperial gallon). See the formula, worked examples, and conversion table.
Pounds per Cup to Pounds 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 / 99.77637266.
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 Pounds per Imperial gallon
Pound per Cup and Pound 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
pounds per imperial gallon = pounds per cup × 19.2151988081
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 pound per imperial gallon equals 99.7763726631 base units, so dividing one by the other gives the direct pound per cup-to-pound per imperial gallon factor of 19.2151988081.
Simple example
1 lb/cup × 19.21519881 = 19.21519881 lb/imp gal
1 pound per cup = 19.21519881 pounds per imperial gallon.
Real-world example
1,000 lb/cup × 19.21519881 = 19,215.19881 lb/imp gal
1,000 pounds per cup = 19,215.19881 pounds per imperial gallon.
Conversion table
| Pound per Cup (lb/cup) | Pound per Imperial gallon (lb/imp gal) |
|---|---|
| 0.1 lb/cup | 1.921519881 lb/imp gal |
| 1 lb/cup | 19.21519881 lb/imp gal |
| 10 lb/cup | 192.1519881 lb/imp gal |
| 100 lb/cup | 1,921.519881 lb/imp gal |
| 1,000 lb/cup | 19,215.19881 lb/imp gal |
| 10,000 lb/cup | 192,151.9881 lb/imp gal |
Reverse conversion: Pound per Imperial gallon to Pound per Cup
19.21519881 lb/imp gal × 0.05204213654 = 1 lb/cup
19.21519881 pounds per imperial gallon = 1 pounds per cup.
pounds per cup = pounds per imperial gallon × 0.0520421365393
For a page dedicated to this direction, see Pound per Imperial gallon to Pound per Cup.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Understanding the Pound per Imperial gallon (lb/imp gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per imperial gallon are in 1 pound per cup?
1 pound per cup equals 19.21519881 pounds per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cup to pound per imperial gallon?
Multiply the pound per cup value by 19.21519881. The converter above does this instantly to whatever precision you set.
How do I convert pound per imperial gallon back to pound per cup?
Use the reverse factor: 1 pound per imperial gallon equals 0.0520421365 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 pound per imperial gallon?
Pound per Imperial gallon (lb/imp gal) is a unit of density.
Is the pound per cup to pound per imperial gallon conversion exact?
Yes. Both pound per cup and pound per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 19.21519881 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.