Mass per volume density.
Carats per Cubic Millimeter to Stones per Liter Converter — ct/mm3 to st/L
Convert Carat per Cubic Millimeter (ct/mm3) to Stone per Liter (st/L) using the exact conversion factor (1 carat per cubic millimeter = 31.49460888 stone per liter). See the formula, worked examples, and conversion table.
Carats per Cubic Millimeter to Stones per Liter 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 / 6350.29318.
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 Liter
Carat per Cubic Millimeter and Stone per Liter 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 liter = carats per cubic millimeter × 31.4946088836
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 liter equals 6350.29318 base units, so dividing one by the other gives the direct carat per cubic millimeter-to-stone per liter factor of 31.4946088836.
Simple example
1 ct/mm3 × 31.49460888 = 31.49460888 st/L
1 carat per cubic millimeter = 31.49460888 stones per liter.
Real-world example
1,000 ct/mm3 × 31.49460888 = 31,494.60888 st/L
1,000 carats per cubic millimeter = 31,494.60888 stones per liter.
Conversion table
| Carat per Cubic Millimeter (ct/mm3) | Stone per Liter (st/L) |
|---|---|
| 0.1 ct/mm3 | 3.149460888 st/L |
| 1 ct/mm3 | 31.49460888 st/L |
| 10 ct/mm3 | 314.9460888 st/L |
| 100 ct/mm3 | 3,149.460888 st/L |
| 1,000 ct/mm3 | 31,494.60888 st/L |
| 10,000 ct/mm3 | 314,946.0888 st/L |
Reverse conversion: Stone per Liter to Carat per Cubic Millimeter
31.49460888 st/L × 0.0317514659 = 0.9999999999 ct/mm3
31.49460888 stones per liter = 0.9999999999 carats per cubic millimeter.
carats per cubic millimeter = stones per liter × 0.0317514659
For a page dedicated to this direction, see Stone per Liter to Carat per Cubic Millimeter.
Understanding the Carat per Cubic Millimeter (ct/mm3)
Mass per volume density.
Understanding the Stone per Liter (st/L)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per liter are in 1 carat per cubic millimeter?
1 carat per cubic millimeter equals 31.49460888 stones per liter, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cubic millimeter to stone per liter?
Multiply the carat per cubic millimeter value by 31.49460888. The converter above does this instantly to whatever precision you set.
How do I convert stone per liter back to carat per cubic millimeter?
Use the reverse factor: 1 stone per liter equals 0.0317514659 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 liter?
Stone per Liter (st/L) is a unit of density.
Is the carat per cubic millimeter to stone per liter conversion exact?
Yes. Both carat per cubic millimeter and stone per liter are defined by fixed standards rather than physical artifacts, so the factor of 31.49460888 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.