Mass per volume density.
Carats per Cubic Millimeter to Stones per Cubic foot Converter — ct/mm3 to st/ft3
Convert Carat per Cubic Millimeter (ct/mm3) to Stone per Cubic foot (st/ft3) using the exact conversion factor (1 carat per cubic millimeter = 891.8280082 stone per cubic foot). See the formula, worked examples, and conversion table.
Carats per Cubic Millimeter 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 200000 / 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 Cubic Millimeter to Stones per Cubic foot
Carat per Cubic Millimeter 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 cubic millimeter × 891.828008231
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per cubic millimeter equals 200000 base units, and 1 stone per cubic foot equals 224.258487235 base units, so dividing one by the other gives the direct carat per cubic millimeter-to-stone per cubic foot factor of 891.828008231.
Simple example
1 ct/mm3 × 891.8280082 = 891.8280082 st/ft3
1 carat per cubic millimeter = 891.8280082 stones per cubic foot.
Real-world example
1,000 ct/mm3 × 891.8280082 = 891,828.0082 st/ft3
1,000 carats per cubic millimeter = 891,828.0082 stones per cubic foot.
Conversion table
| Carat per Cubic Millimeter (ct/mm3) | Stone per Cubic foot (st/ft3) |
|---|---|
| 0.1 ct/mm3 | 89.18280082 st/ft3 |
| 1 ct/mm3 | 891.8280082 st/ft3 |
| 10 ct/mm3 | 8,918.280082 st/ft3 |
| 100 ct/mm3 | 89,182.80082 st/ft3 |
| 1,000 ct/mm3 | 891,828.0082 st/ft3 |
| 10,000 ct/mm3 | 8,918,280.082 st/ft3 |
Reverse conversion: Stone per Cubic foot to Carat per Cubic Millimeter
891.8280082 st/ft3 × 0.001121292436 = 1 ct/mm3
891.8280082 stones per cubic foot = 1 carats per cubic millimeter.
carats per cubic millimeter = stones per cubic foot × 0.00112129243618
For a page dedicated to this direction, see Stone per Cubic foot to Carat per Cubic Millimeter.
Understanding the Carat per Cubic Millimeter (ct/mm3)
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 cubic millimeter?
1 carat per cubic millimeter equals 891.8280082 stones per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cubic millimeter to stone per cubic foot?
Multiply the carat per cubic millimeter value by 891.8280082. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic foot back to carat per cubic millimeter?
Use the reverse factor: 1 stone per cubic foot equals 0.0011212924 carats per cubic millimeter. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per cubic millimeter?
Carat per Cubic Millimeter (ct/mm3) 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 cubic millimeter to stone per cubic foot conversion exact?
Yes. Both carat per cubic millimeter and stone per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 891.8280082 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.