Mass per volume density.
Pounds per Quart to Stones per Cubic yard Converter — lb/qt to st/yd3
Convert Pound per Quart (lb/qt) to Stone per Cubic yard (st/yd3) using the exact conversion factor (1 pound per quart = 57.70686456 stone per cubic yard). See the formula, worked examples, and conversion table.
Pounds per Quart to Stones per Cubic yard 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 / 8.305869898.
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 Stones per Cubic yard
Pound per Quart and Stone per Cubic yard 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
stones per cubic yard = pounds per quart × 57.706864564
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 yard equals 8.30586989761 base units, so dividing one by the other gives the direct pound per quart-to-stone per cubic yard factor of 57.706864564.
Simple example
1 lb/qt × 57.70686456 = 57.70686456 st/yd3
1 pound per quart = 57.70686456 stones per cubic yard.
Real-world example
1,000 lb/qt × 57.70686456 = 57,706.86456 st/yd3
1,000 pounds per quart = 57,706.86456 stones per cubic yard.
Conversion table
| Pound per Quart (lb/qt) | Stone per Cubic yard (st/yd3) |
|---|---|
| 0.1 lb/qt | 5.770686456 st/yd3 |
| 1 lb/qt | 57.70686456 st/yd3 |
| 10 lb/qt | 577.0686456 st/yd3 |
| 100 lb/qt | 5,770.686456 st/yd3 |
| 1,000 lb/qt | 57,706.86456 st/yd3 |
| 10,000 lb/qt | 577,068.6456 st/yd3 |
Reverse conversion: Stone per Cubic yard to Pound per Quart
57.70686456 st/yd3 × 0.01732896091 = 0.9999999999 lb/qt
57.70686456 stones per cubic yard = 0.9999999999 pounds per quart.
pounds per quart = stones per cubic yard × 0.0173289609053
For a page dedicated to this direction, see Stone per Cubic yard to Pound per Quart.
Understanding the Pound per Quart (lb/qt)
Mass per volume density.
Understanding the Stone per Cubic yard (st/yd3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cubic yard are in 1 pound per quart?
1 pound per quart equals 57.70686456 stones per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert pound per quart to stone per cubic yard?
Multiply the pound per quart value by 57.70686456. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic yard back to pound per quart?
Use the reverse factor: 1 stone per cubic yard equals 0.0173289609 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 yard?
Stone per Cubic yard (st/yd3) is a unit of density.
Is the pound per quart to stone per cubic yard conversion exact?
Yes. Both pound per quart and stone per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 57.70686456 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.