Mass per volume density.
Stones per Quart to Pound per Cubic inches Converter — st/qt to lb/in3
Convert Stone per Quart (st/qt) to Pound per Cubic inch (lb/in3) using the exact conversion factor (1 stone per quart = 0.2424242424 pound per cubic inch). See the formula, worked examples, conversion table, and common uses.
Stones per Quart to Pound 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 6710.27993 / 27679.90471.
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 Pound per Cubic inches
Stone per Quart and Pound 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
pound per cubic inches = stones per quart × 0.242424242424
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 cubic inch equals 27679.9047102 base units, so dividing one by the other gives the direct stone per quart-to-pound per cubic inch factor of 0.242424242424.
Simple example
1 st/qt × 0.2424242424 = 0.2424242424 lb/in3
1 stone per quart = 0.2424242424 pound per cubic inches.
Real-world example
1,000 st/qt × 0.2424242424 = 242.4242424 lb/in3
1,000 stones per quart = 242.4242424 pound per cubic inches.
Conversion table
| Stone per Quart (st/qt) | Pound per Cubic inch (lb/in3) |
|---|---|
| 0.1 st/qt | 0.0242424242 lb/in3 |
| 1 st/qt | 0.2424242424 lb/in3 |
| 10 st/qt | 2.424242424 lb/in3 |
| 100 st/qt | 24.24242424 lb/in3 |
| 1,000 st/qt | 242.4242424 lb/in3 |
| 10,000 st/qt | 2,424.242424 lb/in3 |
Reverse conversion: Pound per Cubic inch to Stone per Quart
0.2424242424 lb/in3 × 4.125 = 0.9999999999 st/qt
0.2424242424 pound per cubic inches = 0.9999999999 stones per quart.
stones per quart = pound per cubic inches × 4.125
For a page dedicated to this direction, see Pound per Cubic inch to Stone per Quart.
Understanding the Stone per Quart (st/qt)
Mass per volume density.
Understanding the Pound per Cubic inch
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Where it's used: United States
Uses of the Pound per Cubic inch today
- Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure
Pound per Cubic inch — sources
- US materials-engineering reference tables — Pounds per cubic inch is a commonly tabulated density unit for metals in US machining and materials references.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pound per cubic inches are in 1 stone per quart?
1 stone per quart equals 0.2424242424 pound per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert stone per quart to pound per cubic inch?
Multiply the stone per quart value by 0.2424242424. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic inch back to stone per quart?
Use the reverse factor: 1 pound per cubic inch equals 4.125 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 cubic inch?
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Is the stone per quart to pound per cubic inch conversion exact?
Yes. Both stone per quart and pound per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.2424242424 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.