Mass per volume density.
Carats per Milliliter to Stones per Milliliter Converter — ct/mL to st/mL
Convert Carat per Milliliter (ct/mL) to Stone per Milliliter (st/mL) using the exact conversion factor (1 carat per milliliter = 0.0000314946 stone per milliliter). See the formula, worked examples, and conversion table.
Carats per Milliliter to Stones per Milliliter 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 / 6.35029318e+6.
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 Stones per Milliliter
Carat per Milliliter and Stone per Milliliter 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 milliliter = carats per milliliter × 0.0000314946088836
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 milliliter equals 6350293.18 base units, so dividing one by the other gives the direct carat per milliliter-to-stone per milliliter factor of 0.0000314946088836.
Simple example
1 ct/mL × 0.00003149460888 = 0.0000314946 st/mL
1 carat per milliliter = 0.0000314946 stones per milliliter.
Real-world example
1,000 ct/mL × 0.00003149460888 = 0.0314946089 st/mL
1,000 carats per milliliter = 0.0314946089 stones per milliliter.
Conversion table
| Carat per Milliliter (ct/mL) | Stone per Milliliter (st/mL) |
|---|---|
| 0.1 ct/mL | 0.0000031495 st/mL |
| 1 ct/mL | 0.0000314946 st/mL |
| 10 ct/mL | 0.0003149461 st/mL |
| 100 ct/mL | 0.0031494609 st/mL |
| 1,000 ct/mL | 0.0314946089 st/mL |
| 10,000 ct/mL | 0.3149460888 st/mL |
Reverse conversion: Stone per Milliliter to Carat per Milliliter
0.0000314946 st/mL × 31751.4659 = 0.9999997179 ct/mL
0.0000314946 stones per milliliter = 0.9999997179 carats per milliliter.
carats per milliliter = stones per milliliter × 31751.4659
For a page dedicated to this direction, see Stone per Milliliter to Carat per Milliliter.
Understanding the Carat per Milliliter (ct/mL)
Mass per volume density.
Understanding the Stone per Milliliter (st/mL)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per milliliter are in 1 carat per milliliter?
1 carat per milliliter equals 0.0000314946 stones per milliliter, using the exact defined conversion factor rather than an estimate.
How do I convert carat per milliliter to stone per milliliter?
Multiply the carat per milliliter value by 0.00003149460888. The converter above does this instantly to whatever precision you set.
How do I convert stone per milliliter back to carat per milliliter?
Use the reverse factor: 1 stone per milliliter equals 31,751.4659 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 milliliter?
Stone per Milliliter (st/mL) is a unit of density.
Is the carat per milliliter to stone per milliliter conversion exact?
Yes. Both carat per milliliter and stone per milliliter are defined by fixed standards rather than physical artifacts, so the factor of 0.00003149460888 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.