Mass per volume density.
Pounds per Cup to Stones per Cubic yard Converter — lb/cup to st/yd3
Convert Pound per Cup (lb/cup) to Stone per Cubic yard (st/yd3) using the exact conversion factor (1 pound per cup = 230.8274583 stone per cubic yard). See the formula, worked examples, and conversion table.
Pounds per Cup 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 1917.222837 / 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 Cup to Stones per Cubic yard
Pound per Cup 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 cup × 230.827458256
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cup equals 1917.22283707 base units, and 1 stone per cubic yard equals 8.30586989761 base units, so dividing one by the other gives the direct pound per cup-to-stone per cubic yard factor of 230.827458256.
Simple example
1 lb/cup × 230.8274583 = 230.8274583 st/yd3
1 pound per cup = 230.8274583 stones per cubic yard.
Real-world example
1,000 lb/cup × 230.8274583 = 230,827.4583 st/yd3
1,000 pounds per cup = 230,827.4583 stones per cubic yard.
Conversion table
| Pound per Cup (lb/cup) | Stone per Cubic yard (st/yd3) |
|---|---|
| 0.1 lb/cup | 23.08274583 st/yd3 |
| 1 lb/cup | 230.8274583 st/yd3 |
| 10 lb/cup | 2,308.274583 st/yd3 |
| 100 lb/cup | 23,082.74583 st/yd3 |
| 1,000 lb/cup | 230,827.4583 st/yd3 |
| 10,000 lb/cup | 2,308,274.583 st/yd3 |
Reverse conversion: Stone per Cubic yard to Pound per Cup
230.8274583 st/yd3 × 0.004332240226 = 1 lb/cup
230.8274583 stones per cubic yard = 1 pounds per cup.
pounds per cup = stones per cubic yard × 0.00433224022634
For a page dedicated to this direction, see Stone per Cubic yard to Pound per Cup.
Understanding the Pound per Cup (lb/cup)
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 cup?
1 pound per cup equals 230.8274583 stones per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cup to stone per cubic yard?
Multiply the pound per cup value by 230.8274583. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic yard back to pound per cup?
Use the reverse factor: 1 stone per cubic yard equals 0.0043322402 pounds per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cup?
Pound per Cup (lb/cup) 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 cup to stone per cubic yard conversion exact?
Yes. Both pound per cup and stone per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 230.8274583 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.