Mass per volume density.
Stones per Gallon to Kilograms per Cubic Millimeter Converter — st/gal to kg/mm3
Convert Stone per Gallon (st/gal) to Kilogram per Cubic Millimeter (kg/mm3) using the exact conversion factor (1 stone per gallon = 0.0000016776 kilogram per cubic millimeter). See the formula, worked examples, and conversion table.
Stones per Gallon to Kilograms 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 1677.569982 / 1e+9.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Gallon to Kilograms per Cubic Millimeter
Stone per Gallon and Kilogram 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
kilograms per cubic millimeter = stones per gallon × 0.00000167756998244
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per gallon equals 1677.56998244 base units, and 1 kilogram per cubic millimeter equals 1000000000 base units, so dividing one by the other gives the direct stone per gallon-to-kilogram per cubic millimeter factor of 0.00000167756998244.
Simple example
1 st/gal × 0.000001677569982 = 0.0000016776 kg/mm3
1 stone per gallon = 0.0000016776 kilograms per cubic millimeter.
Real-world example
1,000 st/gal × 0.000001677569982 = 0.00167757 kg/mm3
1,000 stones per gallon = 0.00167757 kilograms per cubic millimeter.
Conversion table
| Stone per Gallon (st/gal) | Kilogram per Cubic Millimeter (kg/mm3) |
|---|---|
| 0.1 st/gal | 1.67757e-7 kg/mm3 |
| 1 st/gal | 0.0000016776 kg/mm3 |
| 10 st/gal | 0.0000167757 kg/mm3 |
| 100 st/gal | 0.000167757 kg/mm3 |
| 1,000 st/gal | 0.00167757 kg/mm3 |
| 10,000 st/gal | 0.0167756998 kg/mm3 |
Reverse conversion: Kilogram per Cubic Millimeter to Stone per Gallon
0.0000016776 kg/mm3 × 596100.318 = 1.000017893 st/gal
0.0000016776 kilograms per cubic millimeter = 1.000017893 stones per gallon.
stones per gallon = kilograms per cubic millimeter × 596100.318001
For a page dedicated to this direction, see Kilogram per Cubic Millimeter to Stone per Gallon.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Understanding the Kilogram per Cubic Millimeter (kg/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per cubic millimeter are in 1 stone per gallon?
1 stone per gallon equals 0.0000016776 kilograms per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert stone per gallon to kilogram per cubic millimeter?
Multiply the stone per gallon value by 0.000001677569982. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cubic millimeter back to stone per gallon?
Use the reverse factor: 1 kilogram per cubic millimeter equals 596,100.318 stones per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
What is a kilogram per cubic millimeter?
Kilogram per Cubic Millimeter (kg/mm3) is a unit of density.
Is the stone per gallon to kilogram per cubic millimeter conversion exact?
Yes. Both stone per gallon and kilogram per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.000001677569982 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.