Mass per volume density.
Pound per Cubic inches to Stones per Cubic yard Converter — lb/in3 to st/yd3
Convert Pound per Cubic inch (lb/in3) to Stone per Cubic yard (st/yd3) using the exact conversion factor (1 pound per cubic inch = 3,332.571429 stone per cubic yard). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches 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 27679.90471 / 8.305869898.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pound per Cubic inches to Stones per Cubic yard
Pound per Cubic inch 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. Pound per Cubic inch is most often used for used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure.
Formula
stones per cubic yard = pound per cubic inches × 3332.57142857
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic inch equals 27679.9047102 base units, and 1 stone per cubic yard equals 8.30586989761 base units, so dividing one by the other gives the direct pound per cubic inch-to-stone per cubic yard factor of 3332.57142857.
Simple example
1 lb/in3 × 3332.571429 = 3,332.571429 st/yd3
1 pound per cubic inch = 3,332.571429 stones per cubic yard.
Real-world example
1,000 lb/in3 × 3332.571429 = 3,332,571.429 st/yd3
1,000 pound per cubic inches = 3,332,571.429 stones per cubic yard.
Conversion table
| Pound per Cubic inch (lb/in3) | Stone per Cubic yard (st/yd3) |
|---|---|
| 0.1 lb/in3 | 333.2571429 st/yd3 |
| 1 lb/in3 | 3,332.571429 st/yd3 |
| 10 lb/in3 | 33,325.71429 st/yd3 |
| 100 lb/in3 | 333,257.1429 st/yd3 |
| 1,000 lb/in3 | 3,332,571.429 st/yd3 |
| 10,000 lb/in3 | 33,325,714.29 st/yd3 |
Reverse conversion: Stone per Cubic yard to Pound per Cubic inch
1 st/yd3 × 0.0003000685871 = 0.0003000686 lb/in3
1 stone per cubic yard = 0.0003000686 pound per cubic inches.
pound per cubic inches = stones per cubic yard × 0.000300068587106
For a page dedicated to this direction, see Stone per Cubic yard to Pound per Cubic inch.
Understanding the Pound per Cubic inch
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Where it's used: United States
Uses of the Pound per Cubic inch today
- Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure
Understanding the Stone per Cubic yard (st/yd3)
Mass per volume density.
Pound per Cubic inch — sources
- US materials-engineering reference tables — Pounds per cubic inch is a commonly tabulated density unit for metals in US machining and materials references.
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 cubic inch?
1 pound per cubic inch equals 3,332.571429 stones per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to stone per cubic yard?
Multiply the pound per cubic inch value by 3332.571429. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic yard back to pound per cubic inch?
Use the reverse factor: 1 stone per cubic yard equals 0.0003000686 pound per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic inch?
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
What is a stone per cubic yard?
Stone per Cubic yard (st/yd3) is a unit of density.
Is the pound per cubic inch to stone per cubic yard conversion exact?
Yes. Both pound per cubic inch and stone per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 3332.571429 used above is exact to as many digits as you choose to display.
Where is the pound per cubic inch still used today?
United States
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.