Mass per volume density.
Pounds per Quart to Stones per Cup Converter — lb/qt to st/cup
Convert Pound per Quart (lb/qt) to Stone per Cup (st/cup) using the exact conversion factor (1 pound per quart = 0.0178571429 stone per cup). See the formula, worked examples, and conversion table.
Pounds per Quart to Stones per Cup 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 / 26841.11972.
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 Cup
Pound per Quart and Stone per Cup 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 cup = pounds per quart × 0.0178571428571
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 cup equals 26841.119719 base units, so dividing one by the other gives the direct pound per quart-to-stone per cup factor of 0.0178571428571.
Simple example
1 lb/qt × 0.01785714286 = 0.0178571429 st/cup
1 pound per quart = 0.0178571429 stones per cup.
Real-world example
1,000 lb/qt × 0.01785714286 = 17.85714286 st/cup
1,000 pounds per quart = 17.85714286 stones per cup.
Conversion table
| Pound per Quart (lb/qt) | Stone per Cup (st/cup) |
|---|---|
| 0.1 lb/qt | 0.0017857143 st/cup |
| 1 lb/qt | 0.0178571429 st/cup |
| 10 lb/qt | 0.1785714286 st/cup |
| 100 lb/qt | 1.785714286 st/cup |
| 1,000 lb/qt | 17.85714286 st/cup |
| 10,000 lb/qt | 178.5714286 st/cup |
Reverse conversion: Stone per Cup to Pound per Quart
0.0178571429 st/cup × 56 = 1.000000002 lb/qt
0.0178571429 stones per cup = 1.000000002 pounds per quart.
pounds per quart = stones per cup × 56
For a page dedicated to this direction, see Stone per Cup to Pound per Quart.
Understanding the Pound per Quart (lb/qt)
Mass per volume density.
Understanding the Stone per Cup (st/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cup are in 1 pound per quart?
1 pound per quart equals 0.0178571429 stones per cup, using the exact defined conversion factor rather than an estimate.
How do I convert pound per quart to stone per cup?
Multiply the pound per quart value by 0.01785714286. The converter above does this instantly to whatever precision you set.
How do I convert stone per cup back to pound per quart?
Use the reverse factor: 1 stone per cup equals 56 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 cup?
Stone per Cup (st/cup) is a unit of density.
Is the pound per quart to stone per cup conversion exact?
Yes. Both pound per quart and stone per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.01785714286 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.