Mass per volume density.
Stones per Liter to Carats per Cubic Millimeter Converter — st/L to ct/mm3
Convert Stone per Liter (st/L) to Carat per Cubic Millimeter (ct/mm3) using the exact conversion factor (1 stone per liter = 0.0317514659 carat per cubic millimeter). See the formula, worked examples, and conversion table.
Stones per Liter to Carats per Cubic Millimeter 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 6350.29318 / 200000.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Liter to Carats per Cubic Millimeter
Stone per Liter and Carat per Cubic Millimeter 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
carats per cubic millimeter = stones per liter × 0.0317514659
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per liter equals 6350.29318 base units, and 1 carat per cubic millimeter equals 200000 base units, so dividing one by the other gives the direct stone per liter-to-carat per cubic millimeter factor of 0.0317514659.
Simple example
1 st/L × 0.0317514659 = 0.0317514659 ct/mm3
1 stone per liter = 0.0317514659 carats per cubic millimeter.
Real-world example
1,000 st/L × 0.0317514659 = 31.7514659 ct/mm3
1,000 stones per liter = 31.7514659 carats per cubic millimeter.
Conversion table
| Stone per Liter (st/L) | Carat per Cubic Millimeter (ct/mm3) |
|---|---|
| 0.1 st/L | 0.0031751466 ct/mm3 |
| 1 st/L | 0.0317514659 ct/mm3 |
| 10 st/L | 0.317514659 ct/mm3 |
| 100 st/L | 3.17514659 ct/mm3 |
| 1,000 st/L | 31.7514659 ct/mm3 |
| 10,000 st/L | 317.514659 ct/mm3 |
Reverse conversion: Carat per Cubic Millimeter to Stone per Liter
0.0317514659 ct/mm3 × 31.49460888 = 1 st/L
0.0317514659 carats per cubic millimeter = 1 stones per liter.
stones per liter = carats per cubic millimeter × 31.4946088836
For a page dedicated to this direction, see Carat per Cubic Millimeter to Stone per Liter.
Understanding the Stone per Liter (st/L)
Mass per volume density.
Understanding the Carat per Cubic Millimeter (ct/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per cubic millimeter are in 1 stone per liter?
1 stone per liter equals 0.0317514659 carats per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert stone per liter to carat per cubic millimeter?
Multiply the stone per liter value by 0.0317514659. The converter above does this instantly to whatever precision you set.
How do I convert carat per cubic millimeter back to stone per liter?
Use the reverse factor: 1 carat per cubic millimeter equals 31.49460888 stones per liter. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per liter?
Stone per Liter (st/L) is a unit of density.
What is a carat per cubic millimeter?
Carat per Cubic Millimeter (ct/mm3) is a unit of density.
Is the stone per liter to carat per cubic millimeter conversion exact?
Yes. Both stone per liter and carat per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.0317514659 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.