Mass per volume density.
Pounds per Cubic foot to Stones per Cubic foot Converter — lb/ft3 to st/ft3
Convert Pound per Cubic foot (lb/ft3) to Stone per Cubic foot (st/ft3) using the exact conversion factor (1 pound per cubic foot = 0.0714285714 stone per cubic foot). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot 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 16.01846337 / 224.2584872.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cubic foot to Stones per Cubic foot
Pound per Cubic foot 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 foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
stones per cubic foot = pounds per cubic foot × 0.0714285714286
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic foot equals 16.018463374 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 foot-to-stone per cubic foot factor of 0.0714285714286.
Simple example
1 lb/ft3 × 0.07142857143 = 0.0714285714 st/ft3
1 pound per cubic foot = 0.0714285714 stones per cubic foot.
Real-world example
1,000 lb/ft3 × 0.07142857143 = 71.42857143 st/ft3
1,000 pounds per cubic foot = 71.42857143 stones per cubic foot.
Conversion table
| Pound per Cubic foot (lb/ft3) | Stone per Cubic foot (st/ft3) |
|---|---|
| 0.1 lb/ft3 | 0.0071428571 st/ft3 |
| 1 lb/ft3 | 0.0714285714 st/ft3 |
| 10 lb/ft3 | 0.7142857143 st/ft3 |
| 100 lb/ft3 | 7.142857143 st/ft3 |
| 1,000 lb/ft3 | 71.42857143 st/ft3 |
| 10,000 lb/ft3 | 714.2857143 st/ft3 |
Reverse conversion: Stone per Cubic foot to Pound per Cubic foot
0.0714285714 st/ft3 × 14 = 0.9999999996 lb/ft3
0.0714285714 stones per cubic foot = 0.9999999996 pounds per cubic foot.
pounds per cubic foot = stones per cubic foot × 14
For a page dedicated to this direction, see Stone per Cubic foot to Pound per Cubic foot.
Understanding the Pound per Cubic foot
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
Where it's used: United States (construction, engineering, materials specifications)
Uses of the Pound per Cubic foot today
- US construction material density specs (concrete, soil, lumber, insulation)
- US engineering material property tables
- Bulk material handling and shipping weight estimates
Understanding the Stone per Cubic foot (st/ft3)
Mass per volume density.
Pound per Cubic foot — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
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 foot?
1 pound per cubic foot equals 0.0714285714 stones per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to stone per cubic foot?
Multiply the pound per cubic foot value by 0.07142857143. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic foot back to pound per cubic foot?
Use the reverse factor: 1 stone per cubic foot equals 14 pounds per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic foot?
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. 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 foot to stone per cubic foot conversion exact?
Yes. Both pound per cubic foot and stone per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 0.07142857143 used above is exact to as many digits as you choose to display.
Where is the pound per cubic foot still used today?
United States (construction, engineering, materials specifications)
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.