Mass per volume density.
Carats per Milliliter to Stone per Cubic inches Converter — ct/mL to st/in3
Convert Carat per Milliliter (ct/mL) to Stone per Cubic inch (st/in3) using the exact conversion factor (1 carat per milliliter = 0.0005161042 stone per cubic inch). See the formula, worked examples, and conversion table.
Carats per Milliliter to Stone per Cubic inches 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 200 / 387518.6659.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Milliliter to Stone per Cubic inches
Carat per Milliliter and Stone per Cubic inch 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
stone per cubic inches = carats per milliliter × 0.00051610417143
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per milliliter equals 200 base units, and 1 stone per cubic inch equals 387518.665943 base units, so dividing one by the other gives the direct carat per milliliter-to-stone per cubic inch factor of 0.00051610417143.
Simple example
1 ct/mL × 0.0005161041714 = 0.0005161042 st/in3
1 carat per milliliter = 0.0005161042 stone per cubic inches.
Real-world example
1,000 ct/mL × 0.0005161041714 = 0.5161041714 st/in3
1,000 carats per milliliter = 0.5161041714 stone per cubic inches.
Conversion table
| Carat per Milliliter (ct/mL) | Stone per Cubic inch (st/in3) |
|---|---|
| 0.1 ct/mL | 0.0000516104 st/in3 |
| 1 ct/mL | 0.0005161042 st/in3 |
| 10 ct/mL | 0.0051610417 st/in3 |
| 100 ct/mL | 0.0516104171 st/in3 |
| 1,000 ct/mL | 0.5161041714 st/in3 |
| 10,000 ct/mL | 5.161041714 st/in3 |
Reverse conversion: Stone per Cubic inch to Carat per Milliliter
0.0005161042 st/in3 × 1937.59333 = 1.000000055 ct/mL
0.0005161042 stone per cubic inches = 1.000000055 carats per milliliter.
carats per milliliter = stone per cubic inches × 1937.59332971
For a page dedicated to this direction, see Stone per Cubic inch to Carat per Milliliter.
Understanding the Carat per Milliliter (ct/mL)
Mass per volume density.
Understanding the Stone per Cubic inch (st/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stone per cubic inches are in 1 carat per milliliter?
1 carat per milliliter equals 0.0005161042 stone per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert carat per milliliter to stone per cubic inch?
Multiply the carat per milliliter value by 0.0005161041714. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic inch back to carat per milliliter?
Use the reverse factor: 1 stone per cubic inch equals 1,937.59333 carats per milliliter. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per milliliter?
Carat per Milliliter (ct/mL) is a unit of density.
What is a stone per cubic inch?
Stone per Cubic inch (st/in3) is a unit of density.
Is the carat per milliliter to stone per cubic inch conversion exact?
Yes. Both carat per milliliter and stone per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.0005161041714 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.