Mass per volume density.
Carats per Cubic Millimeter to Stones per Quart Converter — ct/mm3 to st/qt
Convert Carat per Cubic Millimeter (ct/mm3) to Stone per Quart (st/qt) using the exact conversion factor (1 carat per cubic millimeter = 29.8050159 stone per quart). See the formula, worked examples, and conversion table.
Carats per Cubic Millimeter to Stones per Quart 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 / 6710.27993.
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 Quart
Carat per Cubic Millimeter and Stone per Quart 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 quart = carats per cubic millimeter × 29.8050159001
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 quart equals 6710.27992975 base units, so dividing one by the other gives the direct carat per cubic millimeter-to-stone per quart factor of 29.8050159001.
Simple example
1 ct/mm3 × 29.8050159 = 29.8050159 st/qt
1 carat per cubic millimeter = 29.8050159 stones per quart.
Real-world example
1,000 ct/mm3 × 29.8050159 = 29,805.0159 st/qt
1,000 carats per cubic millimeter = 29,805.0159 stones per quart.
Conversion table
| Carat per Cubic Millimeter (ct/mm3) | Stone per Quart (st/qt) |
|---|---|
| 0.1 ct/mm3 | 2.98050159 st/qt |
| 1 ct/mm3 | 29.8050159 st/qt |
| 10 ct/mm3 | 298.050159 st/qt |
| 100 ct/mm3 | 2,980.50159 st/qt |
| 1,000 ct/mm3 | 29,805.0159 st/qt |
| 10,000 ct/mm3 | 298,050.159 st/qt |
Reverse conversion: Stone per Quart to Carat per Cubic Millimeter
29.8050159 st/qt × 0.03355139965 = 1 ct/mm3
29.8050159 stones per quart = 1 carats per cubic millimeter.
carats per cubic millimeter = stones per quart × 0.0335513996487
For a page dedicated to this direction, see Stone per Quart to Carat per Cubic Millimeter.
Understanding the Carat per Cubic Millimeter (ct/mm3)
Mass per volume density.
Understanding the Stone per Quart (st/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per quart are in 1 carat per cubic millimeter?
1 carat per cubic millimeter equals 29.8050159 stones per quart, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cubic millimeter to stone per quart?
Multiply the carat per cubic millimeter value by 29.8050159. The converter above does this instantly to whatever precision you set.
How do I convert stone per quart back to carat per cubic millimeter?
Use the reverse factor: 1 stone per quart equals 0.0335513997 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 quart?
Stone per Quart (st/qt) is a unit of density.
Is the carat per cubic millimeter to stone per quart conversion exact?
Yes. Both carat per cubic millimeter and stone per quart are defined by fixed standards rather than physical artifacts, so the factor of 29.8050159 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.