Mass per volume density.
Carats per Cubic Millimeter to Stones per Cubic Meter Converter — ct/mm3 to st/m3
Convert Carat per Cubic Millimeter (ct/mm3) to Stone per Cubic Meter (st/m3) using the exact conversion factor (1 carat per cubic millimeter = 31,494.60888 stone per cubic meter). See the formula, worked examples, and conversion table.
Carats per Cubic Millimeter to Stones per Cubic Meter 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 / 6.35029318.
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 Meter
Carat per Cubic Millimeter and Stone per Cubic Meter 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 meter = carats per cubic millimeter × 31494.6088836
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 meter equals 6.35029318 base units, so dividing one by the other gives the direct carat per cubic millimeter-to-stone per cubic meter factor of 31494.6088836.
Simple example
1 ct/mm3 × 31494.60888 = 31,494.60888 st/m3
1 carat per cubic millimeter = 31,494.60888 stones per cubic meter.
Real-world example
1,000 ct/mm3 × 31494.60888 = 31,494,608.88 st/m3
1,000 carats per cubic millimeter = 31,494,608.88 stones per cubic meter.
Conversion table
| Carat per Cubic Millimeter (ct/mm3) | Stone per Cubic Meter (st/m3) |
|---|---|
| 0.1 ct/mm3 | 3,149.460888 st/m3 |
| 1 ct/mm3 | 31,494.60888 st/m3 |
| 10 ct/mm3 | 314,946.0888 st/m3 |
| 100 ct/mm3 | 3,149,460.888 st/m3 |
| 1,000 ct/mm3 | 31,494,608.88 st/m3 |
| 10,000 ct/mm3 | 314,946,088.8 st/m3 |
Reverse conversion: Stone per Cubic Meter to Carat per Cubic Millimeter
1 st/m3 × 0.0000317514659 = 0.0000317515 ct/mm3
1 stone per cubic meter = 0.0000317515 carats per cubic millimeter.
carats per cubic millimeter = stones per cubic meter × 0.0000317514659
For a page dedicated to this direction, see Stone per Cubic Meter to Carat per Cubic Millimeter.
Understanding the Carat per Cubic Millimeter (ct/mm3)
Mass per volume density.
Understanding the Stone per Cubic Meter (st/m3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cubic meter are in 1 carat per cubic millimeter?
1 carat per cubic millimeter equals 31,494.60888 stones per cubic meter, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cubic millimeter to stone per cubic meter?
Multiply the carat per cubic millimeter value by 31494.60888. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic meter back to carat per cubic millimeter?
Use the reverse factor: 1 stone per cubic meter equals 0.0000317515 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 meter?
Stone per Cubic Meter (st/m3) is a unit of density.
Is the carat per cubic millimeter to stone per cubic meter conversion exact?
Yes. Both carat per cubic millimeter and stone per cubic meter are defined by fixed standards rather than physical artifacts, so the factor of 31494.60888 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.