Mass per volume density.
Pounds per Gallon to Grains per Imperial gallon Converter — lb/gal to gr/imp gal
Convert Pound per Gallon (lb/gal) to Grain per Imperial gallon (gr/imp gal) using the exact conversion factor (1 pound per gallon = 8,406.649479 grain per imperial gallon). See the formula, worked examples, conversion table, and common uses.
Pounds per Gallon 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 119.8264273 / 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 Gallon to Grains per Imperial gallon
Pound per Gallon 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. Pound per Gallon is most often used for us paint and coatings density specifications.
Formula
grains per imperial gallon = pounds per gallon × 8406.64947853
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per gallon equals 119.826427317 base units, and 1 grain per imperial gallon equals 0.0142537675233 base units, so dividing one by the other gives the direct pound per gallon-to-grain per imperial gallon factor of 8406.64947853.
Simple example
1 lb/gal × 8406.649479 = 8,406.649479 gr/imp gal
1 pound per gallon = 8,406.649479 grains per imperial gallon.
Real-world example
1,000 lb/gal × 8406.649479 = 8,406,649.479 gr/imp gal
1,000 pounds per gallon = 8,406,649.479 grains per imperial gallon.
Conversion table
| Pound per Gallon (lb/gal) | Grain per Imperial gallon (gr/imp gal) |
|---|---|
| 0.1 lb/gal | 840.6649479 gr/imp gal |
| 1 lb/gal | 8,406.649479 gr/imp gal |
| 10 lb/gal | 84,066.49479 gr/imp gal |
| 100 lb/gal | 840,664.9479 gr/imp gal |
| 1,000 lb/gal | 8,406,649.479 gr/imp gal |
| 10,000 lb/gal | 84,066,494.79 gr/imp gal |
Reverse conversion: Grain per Imperial gallon to Pound per Gallon
1 gr/imp gal × 0.0001189534549 = 0.0001189535 lb/gal
1 grain per imperial gallon = 0.0001189535 pounds per gallon.
pounds per gallon = grains per imperial gallon × 0.000118953454947
For a page dedicated to this direction, see Grain per Imperial gallon to Pound per Gallon.
Understanding the Pound per Gallon
Pound per Gallon (lb/gal) measures density. The US customary unit for liquid density, based on the US gallon (231 cubic inches). It is classified as a US customary density unit.
Where it's used: United States (paint, fuel, and industrial liquid density specifications)
lb/gal vs. lb/ft³. Both are US customary density units; they're related through the real, fixed relationship between the US gallon and the cubic foot (1 cubic foot ≈ 7.48 US gallons), not a round conversion factor.
Uses of the Pound per Gallon today
- US paint and coatings density specifications
- US fuel and petroleum liquid density specs
- Industrial liquid handling and shipping weight calculations
Understanding the Grain per Imperial gallon (gr/imp gal)
Mass per volume density.
Pound per Gallon — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
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 gallon?
1 pound per gallon equals 8,406.649479 grains per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per gallon to grain per imperial gallon?
Multiply the pound per gallon value by 8406.649479. The converter above does this instantly to whatever precision you set.
How do I convert grain per imperial gallon back to pound per gallon?
Use the reverse factor: 1 grain per imperial gallon equals 0.0001189535 pounds per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per gallon?
Pound per Gallon (lb/gal) measures density. The US customary unit for liquid density, based on the US gallon (231 cubic inches). It is classified as a US customary density unit.
What is a grain per imperial gallon?
Grain per Imperial gallon (gr/imp gal) is a unit of density.
Is the pound per gallon to grain per imperial gallon conversion exact?
Yes. Both pound per gallon and grain per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 8406.649479 used above is exact to as many digits as you choose to display.
What is the difference between lb/gal vs. lb/ft³?
Both are US customary density units; they're related through the real, fixed relationship between the US gallon and the cubic foot (1 cubic foot ≈ 7.48 US gallons), not a round conversion factor.
Where is the pound per gallon still used today?
United States (paint, fuel, and industrial liquid density specifications)