Mass per volume density.
Pounds per Gallon to Pounds per Imperial gallon Converter — lb/gal to lb/imp gal
Convert Pound per Gallon (lb/gal) to Pound per Imperial gallon (lb/imp gal) using the exact conversion factor (1 pound per gallon = 1.200949926 pound per imperial gallon). See the formula, worked examples, conversion table, and common uses.
Pounds per Gallon 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 119.8264273 / 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 Gallon to Pounds per Imperial gallon
Pound per Gallon 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. Pound per Gallon is most often used for us paint and coatings density specifications.
Formula
pounds per imperial gallon = pounds per gallon × 1.2009499255
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 pound per imperial gallon equals 99.7763726631 base units, so dividing one by the other gives the direct pound per gallon-to-pound per imperial gallon factor of 1.2009499255.
Simple example
1 lb/gal × 1.200949926 = 1.200949926 lb/imp gal
1 pound per gallon = 1.200949926 pounds per imperial gallon.
Real-world example
1,000 lb/gal × 1.200949926 = 1,200.949926 lb/imp gal
1,000 pounds per gallon = 1,200.949926 pounds per imperial gallon.
Conversion table
| Pound per Gallon (lb/gal) | Pound per Imperial gallon (lb/imp gal) |
|---|---|
| 0.1 lb/gal | 0.1200949926 lb/imp gal |
| 1 lb/gal | 1.200949926 lb/imp gal |
| 10 lb/gal | 12.00949926 lb/imp gal |
| 100 lb/gal | 120.0949926 lb/imp gal |
| 1,000 lb/gal | 1,200.949926 lb/imp gal |
| 10,000 lb/gal | 12,009.49926 lb/imp gal |
Reverse conversion: Pound per Imperial gallon to Pound per Gallon
1.200949926 lb/imp gal × 0.8326741846 = 1 lb/gal
1.200949926 pounds per imperial gallon = 1 pounds per gallon.
pounds per gallon = pounds per imperial gallon × 0.832674184629
For a page dedicated to this direction, see Pound 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 Pound per Imperial gallon (lb/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 pounds per imperial gallon are in 1 pound per gallon?
1 pound per gallon equals 1.200949926 pounds per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per gallon to pound per imperial gallon?
Multiply the pound per gallon value by 1.200949926. The converter above does this instantly to whatever precision you set.
How do I convert pound per imperial gallon back to pound per gallon?
Use the reverse factor: 1 pound per imperial gallon equals 0.8326741846 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 pound per imperial gallon?
Pound per Imperial gallon (lb/imp gal) is a unit of density.
Is the pound per gallon to pound per imperial gallon conversion exact?
Yes. Both pound per gallon and pound per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 1.200949926 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)