Mass per volume density.
Pound per Cubic inches to Stones per Cubic foot Converter — lb/in3 to st/ft3
Convert Pound per Cubic inch (lb/in3) to Stone per Cubic foot (st/ft3) using the exact conversion factor (1 pound per cubic inch = 123.4285714 stone per cubic foot). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches to Stones per Cubic foot 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 / 224.2584872.
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 foot
Pound per Cubic inch and Stone per Cubic foot 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 foot = pound per cubic inches × 123.428571429
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 foot equals 224.258487235 base units, so dividing one by the other gives the direct pound per cubic inch-to-stone per cubic foot factor of 123.428571429.
Simple example
1 lb/in3 × 123.4285714 = 123.4285714 st/ft3
1 pound per cubic inch = 123.4285714 stones per cubic foot.
Real-world example
1,000 lb/in3 × 123.4285714 = 123,428.5714 st/ft3
1,000 pound per cubic inches = 123,428.5714 stones per cubic foot.
Conversion table
| Pound per Cubic inch (lb/in3) | Stone per Cubic foot (st/ft3) |
|---|---|
| 0.1 lb/in3 | 12.34285714 st/ft3 |
| 1 lb/in3 | 123.4285714 st/ft3 |
| 10 lb/in3 | 1,234.285714 st/ft3 |
| 100 lb/in3 | 12,342.85714 st/ft3 |
| 1,000 lb/in3 | 123,428.5714 st/ft3 |
| 10,000 lb/in3 | 1,234,285.714 st/ft3 |
Reverse conversion: Stone per Cubic foot to Pound per Cubic inch
123.4285714 st/ft3 × 0.008101851852 = 0.9999999998 lb/in3
123.4285714 stones per cubic foot = 0.9999999998 pound per cubic inches.
pound per cubic inches = stones per cubic foot × 0.00810185185185
For a page dedicated to this direction, see Stone per Cubic foot 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 foot (st/ft3)
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 foot are in 1 pound per cubic inch?
1 pound per cubic inch equals 123.4285714 stones per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to stone per cubic foot?
Multiply the pound per cubic inch value by 123.4285714. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic foot back to pound per cubic inch?
Use the reverse factor: 1 stone per cubic foot equals 0.0081018519 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 foot?
Stone per Cubic foot (st/ft3) is a unit of density.
Is the pound per cubic inch to stone per cubic foot conversion exact?
Yes. Both pound per cubic inch and stone per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 123.4285714 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.