Mass per volume density.
Pounds per Cup to Grains per Imperial gallon Converter — lb/cup to gr/imp gal
Convert Pound per Cup (lb/cup) to Grain per Imperial gallon (gr/imp gal) using the exact conversion factor (1 pound per cup = 134,506.3917 grain per imperial gallon). See the formula, worked examples, and conversion table.
Pounds per Cup to Grains 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 / 0.01425376752.
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 Grains per Imperial gallon
Pound per Cup and Grain 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
grains per imperial gallon = pounds per cup × 134506.391657
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 grain per imperial gallon equals 0.0142537675233 base units, so dividing one by the other gives the direct pound per cup-to-grain per imperial gallon factor of 134506.391657.
Simple example
1 lb/cup × 134506.3917 = 134,506.3917 gr/imp gal
1 pound per cup = 134,506.3917 grains per imperial gallon.
Real-world example
1,000 lb/cup × 134506.3917 = 134,506,391.7 gr/imp gal
1,000 pounds per cup = 134,506,391.7 grains per imperial gallon.
Conversion table
| Pound per Cup (lb/cup) | Grain per Imperial gallon (gr/imp gal) |
|---|---|
| 0.1 lb/cup | 13,450.63917 gr/imp gal |
| 1 lb/cup | 134,506.3917 gr/imp gal |
| 10 lb/cup | 1,345,063.917 gr/imp gal |
| 100 lb/cup | 13,450,639.17 gr/imp gal |
| 1,000 lb/cup | 134,506,391.7 gr/imp gal |
| 10,000 lb/cup | 1,345,063,917 gr/imp gal |
Reverse conversion: Grain per Imperial gallon to Pound per Cup
1 gr/imp gal × 0.000007434590934 = 0.0000074346 lb/cup
1 grain per imperial gallon = 0.0000074346 pounds per cup.
pounds per cup = grains per imperial gallon × 0.00000743459093419
For a page dedicated to this direction, see Grain per Imperial gallon to Pound per Cup.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Understanding the Grain per Imperial gallon (gr/imp gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per imperial gallon are in 1 pound per cup?
1 pound per cup equals 134,506.3917 grains per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cup to grain per imperial gallon?
Multiply the pound per cup value by 134506.3917. The converter above does this instantly to whatever precision you set.
How do I convert grain per imperial gallon back to pound per cup?
Use the reverse factor: 1 grain per imperial gallon equals 0.0000074346 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 grain per imperial gallon?
Grain per Imperial gallon (gr/imp gal) is a unit of density.
Is the pound per cup to grain per imperial gallon conversion exact?
Yes. Both pound per cup and grain per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 134506.3917 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.