Mass per volume density.
Carats per Cup to Pounds per Cubic foot Converter — ct/cup to lb/ft3
Convert Carat per Cup (ct/cup) to Pound per Cubic foot (lb/ft3) using the exact conversion factor (1 carat per cup = 0.0527735119 pound per cubic foot). See the formula, worked examples, conversion table, and common uses.
Carats 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 0.8453505675 / 16.01846337.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Cup to Pounds per Cubic foot
Carat 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 = carats per cup × 0.0527735119038
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per cup equals 0.845350567546 base units, and 1 pound per cubic foot equals 16.018463374 base units, so dividing one by the other gives the direct carat per cup-to-pound per cubic foot factor of 0.0527735119038.
Simple example
1 ct/cup × 0.0527735119 = 0.0527735119 lb/ft3
1 carat per cup = 0.0527735119 pounds per cubic foot.
Real-world example
1,000 ct/cup × 0.0527735119 = 52.7735119 lb/ft3
1,000 carats per cup = 52.7735119 pounds per cubic foot.
Conversion table
| Carat per Cup (ct/cup) | Pound per Cubic foot (lb/ft3) |
|---|---|
| 0.1 ct/cup | 0.0052773512 lb/ft3 |
| 1 ct/cup | 0.0527735119 lb/ft3 |
| 10 ct/cup | 0.527735119 lb/ft3 |
| 100 ct/cup | 5.27735119 lb/ft3 |
| 1,000 ct/cup | 52.7735119 lb/ft3 |
| 10,000 ct/cup | 527.735119 lb/ft3 |
Reverse conversion: Pound per Cubic foot to Carat per Cup
0.0527735119 lb/ft3 × 18.94890001 = 0.9999999999 ct/cup
0.0527735119 pounds per cubic foot = 0.9999999999 carats per cup.
carats per cup = pounds per cubic foot × 18.9489000054
For a page dedicated to this direction, see Pound per Cubic foot to Carat per Cup.
Understanding the Carat per Cup (ct/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 carat per cup?
1 carat per cup equals 0.0527735119 pounds per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cup to pound per cubic foot?
Multiply the carat per cup value by 0.0527735119. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic foot back to carat per cup?
Use the reverse factor: 1 pound per cubic foot equals 18.94890001 carats per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per cup?
Carat per Cup (ct/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 carat per cup to pound per cubic foot conversion exact?
Yes. Both carat per cup and pound per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 0.0527735119 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.