Mass per volume density.
Stones per Quart to Pounds per Gallon Converter — st/qt to lb/gal
Convert Stone per Quart (st/qt) to Pound per Gallon (lb/gal) using the exact conversion factor (1 stone per quart = 56 pound per gallon). See the formula, worked examples, conversion table, and common uses.
Stones per Quart 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 6710.27993 / 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 Quart to Pounds per Gallon
Stone per Quart 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 quart × 56
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per quart equals 6710.27992975 base units, and 1 pound per gallon equals 119.826427317 base units, so dividing one by the other gives the direct stone per quart-to-pound per gallon factor of 56.
Simple example
1 st/qt × 56 = 56 lb/gal
1 stone per quart = 56 pounds per gallon.
Real-world example
1,000 st/qt × 56 = 56,000 lb/gal
1,000 stones per quart = 56,000 pounds per gallon.
Conversion table
| Stone per Quart (st/qt) | Pound per Gallon (lb/gal) |
|---|---|
| 0.1 st/qt | 5.6 lb/gal |
| 1 st/qt | 56 lb/gal |
| 10 st/qt | 560 lb/gal |
| 100 st/qt | 5,600 lb/gal |
| 1,000 st/qt | 56,000 lb/gal |
| 10,000 st/qt | 560,000 lb/gal |
Reverse conversion: Pound per Gallon to Stone per Quart
56 lb/gal × 0.01785714286 = 1 st/qt
56 pounds per gallon = 1 stone per quart.
stones per quart = pounds per gallon × 0.0178571428571
For a page dedicated to this direction, see Pound per Gallon to Stone per Quart.
Understanding the Stone per Quart (st/qt)
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 quart?
1 stone per quart equals 56 pounds per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per quart to pound per gallon?
Multiply the stone per quart value by 56. The converter above does this instantly to whatever precision you set.
How do I convert pound per gallon back to stone per quart?
Use the reverse factor: 1 pound per gallon equals 0.0178571429 stones per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per quart?
Stone per Quart (st/qt) 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 quart to pound per gallon conversion exact?
Yes. Both stone per quart and pound per gallon are defined by fixed standards rather than physical artifacts, so the factor of 56 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.