Mass per volume density.
Carats per Cup to Stones per Cubic foot Converter — ct/cup to st/ft3
Convert Carat per Cup (ct/cup) to Stone per Cubic foot (st/ft3) using the exact conversion factor (1 carat per cup = 0.0037695366 stone per cubic foot). See the formula, worked examples, and conversion table.
Carats per Cup 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 0.8453505675 / 224.2584872.
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 Stones per Cubic foot
Carat per Cup 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. Both are mass per volume density units.
Formula
stones per cubic foot = carats per cup × 0.00376953656456
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 stone per cubic foot equals 224.258487235 base units, so dividing one by the other gives the direct carat per cup-to-stone per cubic foot factor of 0.00376953656456.
Simple example
1 ct/cup × 0.003769536565 = 0.0037695366 st/ft3
1 carat per cup = 0.0037695366 stones per cubic foot.
Real-world example
1,000 ct/cup × 0.003769536565 = 3.769536565 st/ft3
1,000 carats per cup = 3.769536565 stones per cubic foot.
Conversion table
| Carat per Cup (ct/cup) | Stone per Cubic foot (st/ft3) |
|---|---|
| 0.1 ct/cup | 0.0003769537 st/ft3 |
| 1 ct/cup | 0.0037695366 st/ft3 |
| 10 ct/cup | 0.0376953657 st/ft3 |
| 100 ct/cup | 0.3769536565 st/ft3 |
| 1,000 ct/cup | 3.769536565 st/ft3 |
| 10,000 ct/cup | 37.69536565 st/ft3 |
Reverse conversion: Stone per Cubic foot to Carat per Cup
0.0037695366 st/ft3 × 265.2846001 = 1.000000009 ct/cup
0.0037695366 stones per cubic foot = 1.000000009 carats per cup.
carats per cup = stones per cubic foot × 265.284600076
For a page dedicated to this direction, see Stone per Cubic foot to Carat per Cup.
Understanding the Carat per Cup (ct/cup)
Mass per volume density.
Understanding the Stone per Cubic foot (st/ft3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cubic foot are in 1 carat per cup?
1 carat per cup equals 0.0037695366 stones per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cup to stone per cubic foot?
Multiply the carat per cup value by 0.003769536565. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic foot back to carat per cup?
Use the reverse factor: 1 stone per cubic foot equals 265.2846001 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 stone per cubic foot?
Stone per Cubic foot (st/ft3) is a unit of density.
Is the carat per cup to stone per cubic foot conversion exact?
Yes. Both carat per cup and stone per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 0.003769536565 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.