Mass per volume density.
Carats per Gallon to Stones per Cubic Millimeter Converter — ct/gal to st/mm3
Convert Carat per Gallon (ct/gal) to Stone per Cubic Millimeter (st/mm3) using the exact conversion factor (1 carat per gallon = 8.319995e-12 stone per cubic millimeter). See the formula, worked examples, and conversion table.
Carats per Gallon to Stones 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 0.05283441047 / 6.35029318e+9.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Gallon to Stones per Cubic Millimeter
Carat per Gallon and Stone 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
stones per cubic millimeter = carats per gallon × 8.319995e-12
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per gallon equals 0.0528344104716 base units, and 1 stone per cubic millimeter equals 6350293180 base units, so dividing one by the other gives the direct carat per gallon-to-stone per cubic millimeter factor of 8.319995e-12.
Simple example
1 ct/gal × 8.319995e-12 = 8.319995e-12 st/mm3
1 carat per gallon = 8.319995e-12 stones per cubic millimeter.
Real-world example
1,000 ct/gal × 8.319995e-12 = 8.319995e-9 st/mm3
1,000 carats per gallon = 8.319995e-9 stones per cubic millimeter.
Conversion table
| Carat per Gallon (ct/gal) | Stone per Cubic Millimeter (st/mm3) |
|---|---|
| 0.1 ct/gal | 8.319995e-13 st/mm3 |
| 1 ct/gal | 8.319995e-12 st/mm3 |
| 10 ct/gal | 8.319995e-11 st/mm3 |
| 100 ct/gal | 8.319995e-10 st/mm3 |
| 1,000 ct/gal | 8.319995e-9 st/mm3 |
| 10,000 ct/gal | 8.319995e-8 st/mm3 |
Reverse conversion: Stone per Cubic Millimeter to Carat per Gallon
8.319995e-12 st/mm3 × 120192373200 = 0.9999999439 ct/gal
8.319995e-12 stones per cubic millimeter = 0.9999999439 carats per gallon.
carats per gallon = stones per cubic millimeter × 120192373177
For a page dedicated to this direction, see Stone per Cubic Millimeter to Carat per Gallon.
Understanding the Carat per Gallon (ct/gal)
Mass per volume density.
Understanding the Stone per Cubic Millimeter (st/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cubic millimeter are in 1 carat per gallon?
1 carat per gallon equals 8.319995e-12 stones per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert carat per gallon to stone per cubic millimeter?
Multiply the carat per gallon value by 8.319995e-12. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic millimeter back to carat per gallon?
Use the reverse factor: 1 stone per cubic millimeter equals 120,192,373,200 carats per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per gallon?
Carat per Gallon (ct/gal) is a unit of density.
What is a stone per cubic millimeter?
Stone per Cubic Millimeter (st/mm3) is a unit of density.
Is the carat per gallon to stone per cubic millimeter conversion exact?
Yes. Both carat per gallon and stone per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 8.319995e-12 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.