Mass per volume density.
Stones per Cup to Stones per Cubic Millimeter Converter — st/cup to st/mm3
Convert Stone per Cup (st/cup) to Stone per Cubic Millimeter (st/mm3) using the exact conversion factor (1 stone per cup = 0.0000042268 stone per cubic millimeter). See the formula, worked examples, and conversion table.
Stones per Cup 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 26841.11972 / 6.35029318e+9.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Cup to Stones per Cubic Millimeter
Stone per Cup 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 = stones per cup × 0.00000422675283773
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cup equals 26841.119719 base units, and 1 stone per cubic millimeter equals 6350293180 base units, so dividing one by the other gives the direct stone per cup-to-stone per cubic millimeter factor of 0.00000422675283773.
Simple example
1 st/cup × 0.000004226752838 = 0.0000042268 st/mm3
1 stone per cup = 0.0000042268 stones per cubic millimeter.
Real-world example
1,000 st/cup × 0.000004226752838 = 0.0042267528 st/mm3
1,000 stones per cup = 0.0042267528 stones per cubic millimeter.
Conversion table
| Stone per Cup (st/cup) | Stone per Cubic Millimeter (st/mm3) |
|---|---|
| 0.1 st/cup | 4.226753e-7 st/mm3 |
| 1 st/cup | 0.0000042268 st/mm3 |
| 10 st/cup | 0.0000422675 st/mm3 |
| 100 st/cup | 0.0004226753 st/mm3 |
| 1,000 st/cup | 0.0042267528 st/mm3 |
| 10,000 st/cup | 0.0422675284 st/mm3 |
Reverse conversion: Stone per Cubic Millimeter to Stone per Cup
0.0000042268 st/mm3 × 236588.2365 = 1.000011158 st/cup
0.0000042268 stones per cubic millimeter = 1.000011158 stones per cup.
stones per cup = stones per cubic millimeter × 236588.2365
For a page dedicated to this direction, see Stone per Cubic Millimeter to Stone per Cup.
Understanding the Stone per Cup (st/cup)
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 stone per cup?
1 stone per cup equals 0.0000042268 stones per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cup to stone per cubic millimeter?
Multiply the stone per cup value by 0.000004226752838. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic millimeter back to stone per cup?
Use the reverse factor: 1 stone per cubic millimeter equals 236,588.2365 stones per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cup?
Stone per Cup (st/cup) 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 stone per cup to stone per cubic millimeter conversion exact?
Yes. Both stone per cup and stone per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.000004226752838 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.