Mass per volume density.
Stones per Imperial gallon to Pounds per Gallon Converter — st/imp gal to lb/gal
Convert Stone per Imperial gallon (st/imp gal) to Pound per Gallon (lb/gal) using the exact conversion factor (1 stone per imperial gallon = 11.65743858 pound per gallon). See the formula, worked examples, conversion table, and common uses.
Stones per Imperial gallon to Pounds per 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 1396.869217 / 119.8264273.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Imperial gallon to Pounds per Gallon
Stone per Imperial gallon and Pound per 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 gallon = stones per imperial gallon × 11.6574385848
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per imperial gallon equals 1396.86921728 base units, and 1 pound per gallon equals 119.826427317 base units, so dividing one by the other gives the direct stone per imperial gallon-to-pound per gallon factor of 11.6574385848.
Simple example
1 st/imp gal × 11.65743858 = 11.65743858 lb/gal
1 stone per imperial gallon = 11.65743858 pounds per gallon.
Real-world example
1,000 st/imp gal × 11.65743858 = 11,657.43858 lb/gal
1,000 stones per imperial gallon = 11,657.43858 pounds per gallon.
Conversion table
| Stone per Imperial gallon (st/imp gal) | Pound per Gallon (lb/gal) |
|---|---|
| 0.1 st/imp gal | 1.165743858 lb/gal |
| 1 st/imp gal | 11.65743858 lb/gal |
| 10 st/imp gal | 116.5743858 lb/gal |
| 100 st/imp gal | 1,165.743858 lb/gal |
| 1,000 st/imp gal | 11,657.43858 lb/gal |
| 10,000 st/imp gal | 116,574.3858 lb/gal |
Reverse conversion: Pound per Gallon to Stone per Imperial gallon
11.65743858 lb/gal × 0.08578213754 = 0.9999999996 st/imp gal
11.65743858 pounds per gallon = 0.9999999996 stones per imperial gallon.
stones per imperial gallon = pounds per gallon × 0.0857821375361
For a page dedicated to this direction, see Pound per Gallon to Stone per Imperial gallon.
Understanding the Stone per Imperial gallon (st/imp gal)
Mass per volume density.
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
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 gallon are in 1 stone per imperial gallon?
1 stone per imperial gallon equals 11.65743858 pounds per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per imperial gallon to pound per gallon?
Multiply the stone per imperial gallon value by 11.65743858. The converter above does this instantly to whatever precision you set.
How do I convert pound per gallon back to stone per imperial gallon?
Use the reverse factor: 1 pound per gallon equals 0.0857821375 stones per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per imperial gallon?
Stone per Imperial gallon (st/imp gal) is a unit of density.
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.
Is the stone per imperial gallon to pound per gallon conversion exact?
Yes. Both stone per imperial gallon and pound per gallon are defined by fixed standards rather than physical artifacts, so the factor of 11.65743858 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.