Mass per volume density.
Stones per Cup to Pounds per Cubic foot Converter — st/cup to lb/ft3
Convert Stone per Cup (st/cup) to Pound per Cubic foot (lb/ft3) using the exact conversion factor (1 stone per cup = 1,675.636364 pound per cubic foot). See the formula, worked examples, conversion table, and common uses.
Stones per Cup 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 26841.11972 / 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 Cup to Pounds per Cubic foot
Stone per Cup 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 cup × 1675.63636364
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cup equals 26841.119719 base units, and 1 pound per cubic foot equals 16.018463374 base units, so dividing one by the other gives the direct stone per cup-to-pound per cubic foot factor of 1675.63636364.
Simple example
1 st/cup × 1675.636364 = 1,675.636364 lb/ft3
1 stone per cup = 1,675.636364 pounds per cubic foot.
Real-world example
1,000 st/cup × 1675.636364 = 1,675,636.364 lb/ft3
1,000 stones per cup = 1,675,636.364 pounds per cubic foot.
Conversion table
| Stone per Cup (st/cup) | Pound per Cubic foot (lb/ft3) |
|---|---|
| 0.1 st/cup | 167.5636364 lb/ft3 |
| 1 st/cup | 1,675.636364 lb/ft3 |
| 10 st/cup | 16,756.36364 lb/ft3 |
| 100 st/cup | 167,563.6364 lb/ft3 |
| 1,000 st/cup | 1,675,636.364 lb/ft3 |
| 10,000 st/cup | 16,756,363.64 lb/ft3 |
Reverse conversion: Pound per Cubic foot to Stone per Cup
1 lb/ft3 × 0.0005967881944 = 0.0005967882 st/cup
1 pound per cubic foot = 0.0005967882 stones per cup.
stones per cup = pounds per cubic foot × 0.000596788194444
For a page dedicated to this direction, see Pound per Cubic foot to Stone per Cup.
Understanding the Stone per Cup (st/cup)
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 cup?
1 stone per cup equals 1,675.636364 pounds per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cup to pound per cubic foot?
Multiply the stone per cup value by 1675.636364. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic foot back to stone per cup?
Use the reverse factor: 1 pound per cubic foot equals 0.0005967882 stones per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cup?
Stone per Cup (st/cup) 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 cup to pound per cubic foot conversion exact?
Yes. Both stone per cup and pound per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 1675.636364 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.