Mass per volume density.
Stones per Gallon to Pounds per Imperial gallon Converter — st/gal to lb/imp gal
Convert Stone per Gallon (st/gal) to Pound per Imperial gallon (lb/imp gal) using the exact conversion factor (1 stone per gallon = 16.81329896 pound per imperial gallon). See the formula, worked examples, and conversion table.
Stones 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 1677.569982 / 99.77637266.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Gallon to Pounds per Imperial gallon
Stone 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. Both are mass per volume density units.
Formula
pounds per imperial gallon = stones per gallon × 16.8132989571
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per gallon equals 1677.56998244 base units, and 1 pound per imperial gallon equals 99.7763726631 base units, so dividing one by the other gives the direct stone per gallon-to-pound per imperial gallon factor of 16.8132989571.
Simple example
1 st/gal × 16.81329896 = 16.81329896 lb/imp gal
1 stone per gallon = 16.81329896 pounds per imperial gallon.
Real-world example
1,000 st/gal × 16.81329896 = 16,813.29896 lb/imp gal
1,000 stones per gallon = 16,813.29896 pounds per imperial gallon.
Conversion table
| Stone per Gallon (st/gal) | Pound per Imperial gallon (lb/imp gal) |
|---|---|
| 0.1 st/gal | 1.681329896 lb/imp gal |
| 1 st/gal | 16.81329896 lb/imp gal |
| 10 st/gal | 168.1329896 lb/imp gal |
| 100 st/gal | 1,681.329896 lb/imp gal |
| 1,000 st/gal | 16,813.29896 lb/imp gal |
| 10,000 st/gal | 168,132.9896 lb/imp gal |
Reverse conversion: Pound per Imperial gallon to Stone per Gallon
16.81329896 lb/imp gal × 0.05947672747 = 1 st/gal
16.81329896 pounds per imperial gallon = 1 stones per gallon.
stones per gallon = pounds per imperial gallon × 0.0594767274735
For a page dedicated to this direction, see Pound per Imperial gallon to Stone per Gallon.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Understanding the Pound per Imperial gallon (lb/imp gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per imperial gallon are in 1 stone per gallon?
1 stone per gallon equals 16.81329896 pounds per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per gallon to pound per imperial gallon?
Multiply the stone per gallon value by 16.81329896. The converter above does this instantly to whatever precision you set.
How do I convert pound per imperial gallon back to stone per gallon?
Use the reverse factor: 1 pound per imperial gallon equals 0.0594767275 stones per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
What is a pound per imperial gallon?
Pound per Imperial gallon (lb/imp gal) is a unit of density.
Is the stone per gallon to pound per imperial gallon conversion exact?
Yes. Both stone per gallon and pound per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 16.81329896 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.