Mass per volume density.
Stones per Cubic yard to Stones per Cup Converter — st/yd3 to st/cup
Convert Stone per Cubic yard (st/yd3) to Stone per Cup (st/cup) using the exact conversion factor (1 stone per cubic yard = 0.0003094457 stone per cup). See the formula, worked examples, and conversion table.
Stones 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 8.305869898 / 26841.11972.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Cubic yard to Stones per Cup
Stone 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 = stones per cubic yard × 0.000309445730453
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cubic yard equals 8.30586989761 base units, and 1 stone per cup equals 26841.119719 base units, so dividing one by the other gives the direct stone per cubic yard-to-stone per cup factor of 0.000309445730453.
Simple example
1 st/yd3 × 0.0003094457305 = 0.0003094457 st/cup
1 stone per cubic yard = 0.0003094457 stones per cup.
Real-world example
1,000 st/yd3 × 0.0003094457305 = 0.3094457305 st/cup
1,000 stones per cubic yard = 0.3094457305 stones per cup.
Conversion table
| Stone per Cubic yard (st/yd3) | Stone per Cup (st/cup) |
|---|---|
| 0.1 st/yd3 | 0.0000309446 st/cup |
| 1 st/yd3 | 0.0003094457 st/cup |
| 10 st/yd3 | 0.0030944573 st/cup |
| 100 st/yd3 | 0.0309445731 st/cup |
| 1,000 st/yd3 | 0.3094457305 st/cup |
| 10,000 st/yd3 | 3.094457305 st/cup |
Reverse conversion: Stone per Cup to Stone per Cubic yard
0.0003094457 st/cup × 3231.584416 = 0.9999999016 st/yd3
0.0003094457 stones per cup = 0.9999999016 stones per cubic yard.
stones per cubic yard = stones per cup × 3231.58441558
For a page dedicated to this direction, see Stone per Cup to Stone per Cubic yard.
Understanding the Stone per Cubic yard (st/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 stone per cubic yard?
1 stone per cubic yard equals 0.0003094457 stones per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cubic yard to stone per cup?
Multiply the stone per cubic yard value by 0.0003094457305. The converter above does this instantly to whatever precision you set.
How do I convert stone per cup back to stone per cubic yard?
Use the reverse factor: 1 stone per cup equals 3,231.584416 stones per cubic yard. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cubic yard?
Stone per Cubic yard (st/yd3) is a unit of density.
What is a stone per cup?
Stone per Cup (st/cup) is a unit of density.
Is the stone per cubic yard to stone per cup conversion exact?
Yes. Both stone per cubic yard and stone per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.0003094457305 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.