Mass per volume density.
Pounds per Quart to Stone per Cubic inches Converter — lb/qt to st/in3
Convert Pound per Quart (lb/qt) to Stone per Cubic inch (st/in3) using the exact conversion factor (1 pound per quart = 0.0012368584 stone per cubic inch). See the formula, worked examples, and conversion table.
Pounds per Quart to Stone per Cubic inches 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 479.3057093 / 387518.6659.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Quart to Stone per Cubic inches
Pound per Quart and Stone per Cubic inch 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
stone per cubic inches = pounds per quart × 0.00123685837972
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per quart equals 479.305709268 base units, and 1 stone per cubic inch equals 387518.665943 base units, so dividing one by the other gives the direct pound per quart-to-stone per cubic inch factor of 0.00123685837972.
Simple example
1 lb/qt × 0.00123685838 = 0.0012368584 st/in3
1 pound per quart = 0.0012368584 stone per cubic inches.
Real-world example
1,000 lb/qt × 0.00123685838 = 1.23685838 st/in3
1,000 pounds per quart = 1.23685838 stone per cubic inches.
Conversion table
| Pound per Quart (lb/qt) | Stone per Cubic inch (st/in3) |
|---|---|
| 0.1 lb/qt | 0.0001236858 st/in3 |
| 1 lb/qt | 0.0012368584 st/in3 |
| 10 lb/qt | 0.0123685838 st/in3 |
| 100 lb/qt | 0.123685838 st/in3 |
| 1,000 lb/qt | 1.23685838 st/in3 |
| 10,000 lb/qt | 12.3685838 st/in3 |
Reverse conversion: Stone per Cubic inch to Pound per Quart
0.0012368584 st/in3 × 808.5 = 1.000000016 lb/qt
0.0012368584 stone per cubic inches = 1.000000016 pounds per quart.
pounds per quart = stone per cubic inches × 808.5
For a page dedicated to this direction, see Stone per Cubic inch to Pound per Quart.
Understanding the Pound per Quart (lb/qt)
Mass per volume density.
Understanding the Stone per Cubic inch (st/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stone per cubic inches are in 1 pound per quart?
1 pound per quart equals 0.0012368584 stone per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert pound per quart to stone per cubic inch?
Multiply the pound per quart value by 0.00123685838. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic inch back to pound per quart?
Use the reverse factor: 1 stone per cubic inch equals 808.5 pounds per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per quart?
Pound per Quart (lb/qt) is a unit of density.
What is a stone per cubic inch?
Stone per Cubic inch (st/in3) is a unit of density.
Is the pound per quart to stone per cubic inch conversion exact?
Yes. Both pound per quart and stone per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.00123685838 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.