Mass per volume density.
Stones per Teaspoon to Pounds per Quart Converter — st/tsp to lb/qt
Convert Stone per Teaspoon (st/tsp) to Pound per Quart (lb/qt) using the exact conversion factor (1 stone per teaspoon = 2,688 pound per quart). See the formula, worked examples, and conversion table.
Stones per Teaspoon 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 1.28837375e+6 / 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 Teaspoon to Pounds per Quart
Stone per Teaspoon 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 teaspoon × 2688
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per teaspoon equals 1288373.74651 base units, and 1 pound per quart equals 479.305709268 base units, so dividing one by the other gives the direct stone per teaspoon-to-pound per quart factor of 2688.
Simple example
1 st/tsp × 2688 = 2,688 lb/qt
1 stone per teaspoon = 2,688 pounds per quart.
Real-world example
1,000 st/tsp × 2688 = 2,688,000 lb/qt
1,000 stones per teaspoon = 2,688,000 pounds per quart.
Conversion table
| Stone per Teaspoon (st/tsp) | Pound per Quart (lb/qt) |
|---|---|
| 0.1 st/tsp | 268.8 lb/qt |
| 1 st/tsp | 2,688 lb/qt |
| 10 st/tsp | 26,880 lb/qt |
| 100 st/tsp | 268,800 lb/qt |
| 1,000 st/tsp | 2,688,000 lb/qt |
| 10,000 st/tsp | 26,880,000 lb/qt |
Reverse conversion: Pound per Quart to Stone per Teaspoon
1 lb/qt × 0.0003720238095 = 0.0003720238 st/tsp
1 pound per quart = 0.0003720238 stones per teaspoon.
stones per teaspoon = pounds per quart × 0.000372023809524
For a page dedicated to this direction, see Pound per Quart to Stone per Teaspoon.
Understanding the Stone per Teaspoon (st/tsp)
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 teaspoon?
1 stone per teaspoon equals 2,688 pounds per quart, using the exact defined conversion factor rather than an estimate.
How do I convert stone per teaspoon to pound per quart?
Multiply the stone per teaspoon value by 2688. The converter above does this instantly to whatever precision you set.
How do I convert pound per quart back to stone per teaspoon?
Use the reverse factor: 1 pound per quart equals 0.0003720238 stones per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per teaspoon?
Stone per Teaspoon (st/tsp) 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 teaspoon to pound per quart conversion exact?
Yes. Both stone per teaspoon and pound per quart are defined by fixed standards rather than physical artifacts, so the factor of 2688 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.