Mass per volume density.
Pounds per Imperial gallon to Grain per Cubic inches Converter — lb/imp gal to gr/in3
Convert Pound per Imperial gallon (lb/imp gal) to Grain per Cubic inch (gr/in3) using the exact conversion factor (1 pound per imperial gallon = 25.23255105 grain per cubic inch). See the formula, worked examples, and conversion table.
Pounds per Imperial gallon to Grain per Cubic inches 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 / 3.954272101.
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 Grain per Cubic inches
Pound per Imperial gallon and Grain per Cubic inch 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
grain per cubic inches = pounds per imperial gallon × 25.2325510494
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 grain per cubic inch equals 3.95427210146 base units, so dividing one by the other gives the direct pound per imperial gallon-to-grain per cubic inch factor of 25.2325510494.
Simple example
1 lb/imp gal × 25.23255105 = 25.23255105 gr/in3
1 pound per imperial gallon = 25.23255105 grain per cubic inches.
Real-world example
1,000 lb/imp gal × 25.23255105 = 25,232.55105 gr/in3
1,000 pounds per imperial gallon = 25,232.55105 grain per cubic inches.
Conversion table
| Pound per Imperial gallon (lb/imp gal) | Grain per Cubic inch (gr/in3) |
|---|---|
| 0.1 lb/imp gal | 2.523255105 gr/in3 |
| 1 lb/imp gal | 25.23255105 gr/in3 |
| 10 lb/imp gal | 252.3255105 gr/in3 |
| 100 lb/imp gal | 2,523.255105 gr/in3 |
| 1,000 lb/imp gal | 25,232.55105 gr/in3 |
| 10,000 lb/imp gal | 252,325.5105 gr/in3 |
Reverse conversion: Grain per Cubic inch to Pound per Imperial gallon
25.23255105 gr/in3 × 0.03963134754 = 1 lb/imp gal
25.23255105 grain per cubic inches = 1 pounds per imperial gallon.
pounds per imperial gallon = grain per cubic inches × 0.0396313475417
For a page dedicated to this direction, see Grain per Cubic inch to Pound per Imperial gallon.
Understanding the Pound per Imperial gallon (lb/imp gal)
Mass per volume density.
Understanding the Grain per Cubic inch (gr/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grain per cubic inches are in 1 pound per imperial gallon?
1 pound per imperial gallon equals 25.23255105 grain per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert pound per imperial gallon to grain per cubic inch?
Multiply the pound per imperial gallon value by 25.23255105. The converter above does this instantly to whatever precision you set.
How do I convert grain per cubic inch back to pound per imperial gallon?
Use the reverse factor: 1 grain per cubic inch equals 0.0396313475 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 grain per cubic inch?
Grain per Cubic inch (gr/in3) is a unit of density.
Is the pound per imperial gallon to grain per cubic inch conversion exact?
Yes. Both pound per imperial gallon and grain per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 25.23255105 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.