Mass per volume density.
Stones per Cup to Carats per Cubic foot Converter — st/cup to ct/ft3
Convert Stone per Cup (st/cup) to Carat per Cubic foot (ct/ft3) using the exact conversion factor (1 stone per cup = 3,800,279.347 carat per cubic foot). See the formula, worked examples, and conversion table.
Stones per Cup to Carats 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 / 0.007062933344.
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 Carats per Cubic foot
Stone per Cup and Carat 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
carats per cubic foot = stones per cup × 3800279.3472
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 carat per cubic foot equals 0.0070629333443 base units, so dividing one by the other gives the direct stone per cup-to-carat per cubic foot factor of 3800279.3472.
Simple example
1 st/cup × 3800279.347 = 3,800,279.347 ct/ft3
1 stone per cup = 3,800,279.347 carats per cubic foot.
Real-world example
1,000 st/cup × 3800279.347 = 3,800,279,347 ct/ft3
1,000 stones per cup = 3,800,279,347 carats per cubic foot.
Conversion table
| Stone per Cup (st/cup) | Carat per Cubic foot (ct/ft3) |
|---|---|
| 0.1 st/cup | 380,027.9347 ct/ft3 |
| 1 st/cup | 3,800,279.347 ct/ft3 |
| 10 st/cup | 38,002,793.47 ct/ft3 |
| 100 st/cup | 380,027,934.7 ct/ft3 |
| 1,000 st/cup | 3,800,279,347 ct/ft3 |
| 10,000 st/cup | 38,002,793,470 ct/ft3 |
Reverse conversion: Carat per Cubic foot to Stone per Cup
1 ct/ft3 × 2.631386e-7 = 2.631386e-7 st/cup
1 carat per cubic foot = 2.631386e-7 stones per cup.
stones per cup = carats per cubic foot × 2.631386e-7
For a page dedicated to this direction, see Carat per Cubic foot to Stone per Cup.
Understanding the Stone per Cup (st/cup)
Mass per volume density.
Understanding the Carat per Cubic foot (ct/ft3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per cubic foot are in 1 stone per cup?
1 stone per cup equals 3,800,279.347 carats per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cup to carat per cubic foot?
Multiply the stone per cup value by 3800279.347. The converter above does this instantly to whatever precision you set.
How do I convert carat per cubic foot back to stone per cup?
Use the reverse factor: 1 carat per cubic foot equals 2.631386e-7 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 carat per cubic foot?
Carat per Cubic foot (ct/ft3) is a unit of density.
Is the stone per cup to carat per cubic foot conversion exact?
Yes. Both stone per cup and carat per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 3800279.347 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.