Mass per volume density.
Pounds per Cubic yard to Stones per Cup Converter — lb/yd3 to st/cup
Convert Pound per Cubic yard (lb/yd3) to Stone per Cup (st/cup) using the exact conversion factor (1 pound per cubic yard = 0.0000221033 stone per cup). See the formula, worked examples, and conversion table.
Pounds per Cubic yard 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 0.5932764213 / 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 Cubic yard to Stones per Cup
Pound per Cubic yard 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 cubic yard × 0.0000221032664609
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic yard equals 0.593276421258 base units, and 1 stone per cup equals 26841.119719 base units, so dividing one by the other gives the direct pound per cubic yard-to-stone per cup factor of 0.0000221032664609.
Simple example
1 lb/yd3 × 0.00002210326646 = 0.0000221033 st/cup
1 pound per cubic yard = 0.0000221033 stones per cup.
Real-world example
1,000 lb/yd3 × 0.00002210326646 = 0.0221032665 st/cup
1,000 pounds per cubic yard = 0.0221032665 stones per cup.
Conversion table
| Pound per Cubic yard (lb/yd3) | Stone per Cup (st/cup) |
|---|---|
| 0.1 lb/yd3 | 0.0000022103 st/cup |
| 1 lb/yd3 | 0.0000221033 st/cup |
| 10 lb/yd3 | 0.0002210327 st/cup |
| 100 lb/yd3 | 0.0022103266 st/cup |
| 1,000 lb/yd3 | 0.0221032665 st/cup |
| 10,000 lb/yd3 | 0.2210326646 st/cup |
Reverse conversion: Stone per Cup to Pound per Cubic yard
0.0000221033 st/cup × 45242.18182 = 1.000001517 lb/yd3
0.0000221033 stones per cup = 1.000001517 pounds per cubic yard.
pounds per cubic yard = stones per cup × 45242.1818182
For a page dedicated to this direction, see Stone per Cup to Pound per Cubic yard.
Understanding the Pound per Cubic yard (lb/yd3)
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 cubic yard?
1 pound per cubic yard equals 0.0000221033 stones per cup, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic yard to stone per cup?
Multiply the pound per cubic yard value by 0.00002210326646. The converter above does this instantly to whatever precision you set.
How do I convert stone per cup back to pound per cubic yard?
Use the reverse factor: 1 stone per cup equals 45,242.18182 pounds per cubic yard. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic yard?
Pound per Cubic yard (lb/yd3) 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 cubic yard to stone per cup conversion exact?
Yes. Both pound per cubic yard and stone per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.00002210326646 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.