Mass per volume density.
Stones per Cubic foot to Carats per Cubic Millimeter Converter — st/ft3 to ct/mm3
Convert Stone per Cubic foot (st/ft3) to Carat per Cubic Millimeter (ct/mm3) using the exact conversion factor (1 stone per cubic foot = 0.0011212924 carat per cubic millimeter). See the formula, worked examples, and conversion table.
Stones per Cubic foot to Carats per Cubic Millimeter 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 224.2584872 / 200000.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Cubic foot to Carats per Cubic Millimeter
Stone per Cubic foot and Carat per Cubic Millimeter 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 millimeter = stones per cubic foot × 0.00112129243618
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cubic foot equals 224.258487235 base units, and 1 carat per cubic millimeter equals 200000 base units, so dividing one by the other gives the direct stone per cubic foot-to-carat per cubic millimeter factor of 0.00112129243618.
Simple example
1 st/ft3 × 0.001121292436 = 0.0011212924 ct/mm3
1 stone per cubic foot = 0.0011212924 carats per cubic millimeter.
Real-world example
1,000 st/ft3 × 0.001121292436 = 1.121292436 ct/mm3
1,000 stones per cubic foot = 1.121292436 carats per cubic millimeter.
Conversion table
| Stone per Cubic foot (st/ft3) | Carat per Cubic Millimeter (ct/mm3) |
|---|---|
| 0.1 st/ft3 | 0.0001121292 ct/mm3 |
| 1 st/ft3 | 0.0011212924 ct/mm3 |
| 10 st/ft3 | 0.0112129244 ct/mm3 |
| 100 st/ft3 | 0.1121292436 ct/mm3 |
| 1,000 st/ft3 | 1.121292436 ct/mm3 |
| 10,000 st/ft3 | 11.21292436 ct/mm3 |
Reverse conversion: Carat per Cubic Millimeter to Stone per Cubic foot
0.0011212924 ct/mm3 × 891.8280082 = 0.9999999677 st/ft3
0.0011212924 carats per cubic millimeter = 0.9999999677 stones per cubic foot.
stones per cubic foot = carats per cubic millimeter × 891.828008231
For a page dedicated to this direction, see Carat per Cubic Millimeter to Stone per Cubic foot.
Understanding the Stone per Cubic foot (st/ft3)
Mass per volume density.
Understanding the Carat per Cubic Millimeter (ct/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per cubic millimeter are in 1 stone per cubic foot?
1 stone per cubic foot equals 0.0011212924 carats per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cubic foot to carat per cubic millimeter?
Multiply the stone per cubic foot value by 0.001121292436. The converter above does this instantly to whatever precision you set.
How do I convert carat per cubic millimeter back to stone per cubic foot?
Use the reverse factor: 1 carat per cubic millimeter equals 891.8280082 stones per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cubic foot?
Stone per Cubic foot (st/ft3) is a unit of density.
What is a carat per cubic millimeter?
Carat per Cubic Millimeter (ct/mm3) is a unit of density.
Is the stone per cubic foot to carat per cubic millimeter conversion exact?
Yes. Both stone per cubic foot and carat per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.001121292436 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.