Mass per volume density.
Stones per Gallon to Pounds per Quart Converter — st/gal to lb/qt
Convert Stone per Gallon (st/gal) to Pound per Quart (lb/qt) using the exact conversion factor (1 stone per gallon = 3.5 pound per quart). See the formula, worked examples, and conversion table.
Stones per Gallon to Pounds per Quart 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 / 479.3057093.
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 Quart
Stone per Gallon and Pound per Quart 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 quart = stones per gallon × 3.5
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 quart equals 479.305709268 base units, so dividing one by the other gives the direct stone per gallon-to-pound per quart factor of 3.5.
Simple example
1 st/gal × 3.5 = 3.5 lb/qt
1 stone per gallon = 3.5 pounds per quart.
Real-world example
1,000 st/gal × 3.5 = 3,500 lb/qt
1,000 stones per gallon = 3,500 pounds per quart.
Conversion table
| Stone per Gallon (st/gal) | Pound per Quart (lb/qt) |
|---|---|
| 0.1 st/gal | 0.35 lb/qt |
| 1 st/gal | 3.5 lb/qt |
| 10 st/gal | 35 lb/qt |
| 100 st/gal | 350 lb/qt |
| 1,000 st/gal | 3,500 lb/qt |
| 10,000 st/gal | 35,000 lb/qt |
Reverse conversion: Pound per Quart to Stone per Gallon
3.5 lb/qt × 0.2857142857 = 1 st/gal
3.5 pounds per quart = 1 stone per gallon.
stones per gallon = pounds per quart × 0.285714285714
For a page dedicated to this direction, see Pound per Quart to Stone per Gallon.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Understanding the Pound per Quart (lb/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per quart are in 1 stone per gallon?
1 stone per gallon equals 3.5 pounds per quart, using the exact defined conversion factor rather than an estimate.
How do I convert stone per gallon to pound per quart?
Multiply the stone per gallon value by 3.5. The converter above does this instantly to whatever precision you set.
How do I convert pound per quart back to stone per gallon?
Use the reverse factor: 1 pound per quart equals 0.2857142857 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 quart?
Pound per Quart (lb/qt) is a unit of density.
Is the stone per gallon to pound per quart conversion exact?
Yes. Both stone per gallon and pound per quart are defined by fixed standards rather than physical artifacts, so the factor of 3.5 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.