Mass per volume density.
Stones per Cubic Meter to Pounds per Cubic foot Converter — st/m3 to lb/ft3
Convert Stone per Cubic Meter (st/m3) to Pound per Cubic foot (lb/ft3) using the exact conversion factor (1 stone per cubic meter = 0.3964358523 pound per cubic foot). See the formula, worked examples, conversion table, and common uses.
Stones per Cubic Meter to Pounds 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 6.35029318 / 16.01846337.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Cubic Meter to Pounds per Cubic foot
Stone per Cubic Meter and Pound 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. Both are mass per volume density units.
Formula
pounds per cubic foot = stones per cubic meter × 0.396435852288
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cubic meter equals 6.35029318 base units, and 1 pound per cubic foot equals 16.018463374 base units, so dividing one by the other gives the direct stone per cubic meter-to-pound per cubic foot factor of 0.396435852288.
Simple example
1 st/m3 × 0.3964358523 = 0.3964358523 lb/ft3
1 stone per cubic meter = 0.3964358523 pounds per cubic foot.
Real-world example
1,000 st/m3 × 0.3964358523 = 396.4358523 lb/ft3
1,000 stones per cubic meter = 396.4358523 pounds per cubic foot.
Conversion table
| Stone per Cubic Meter (st/m3) | Pound per Cubic foot (lb/ft3) |
|---|---|
| 0.1 st/m3 | 0.0396435852 lb/ft3 |
| 1 st/m3 | 0.3964358523 lb/ft3 |
| 10 st/m3 | 3.964358523 lb/ft3 |
| 100 st/m3 | 39.64358523 lb/ft3 |
| 1,000 st/m3 | 396.4358523 lb/ft3 |
| 10,000 st/m3 | 3,964.358523 lb/ft3 |
Reverse conversion: Pound per Cubic foot to Stone per Cubic Meter
0.3964358523 lb/ft3 × 2.522476194 = 1 st/m3
0.3964358523 pounds per cubic foot = 1 stones per cubic meter.
stones per cubic meter = pounds per cubic foot × 2.52247619439
For a page dedicated to this direction, see Pound per Cubic foot to Stone per Cubic Meter.
Understanding the Stone per Cubic Meter (st/m3)
Mass per volume density.
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
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 pounds per cubic foot are in 1 stone per cubic meter?
1 stone per cubic meter equals 0.3964358523 pounds per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cubic meter to pound per cubic foot?
Multiply the stone per cubic meter value by 0.3964358523. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic foot back to stone per cubic meter?
Use the reverse factor: 1 pound per cubic foot equals 2.522476194 stones per cubic meter. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cubic meter?
Stone per Cubic Meter (st/m3) is a unit of density.
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.
Is the stone per cubic meter to pound per cubic foot conversion exact?
Yes. Both stone per cubic meter and pound per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 0.3964358523 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.