Mass per volume density.
Stones per Pint to Pounds per Cubic Millimeter Converter — st/pt to lb/mm3
Convert Stone per Pint (st/pt) to Pound per Cubic Millimeter (lb/mm3) using the exact conversion factor (1 stone per pint = 0.0000295873 pound per cubic millimeter). See the formula, worked examples, and conversion table.
Stones per Pint to Pounds 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 13420.55986 / 4.5359237e+8.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Pint to Pounds per Cubic Millimeter
Stone per Pint and Pound 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
pounds per cubic millimeter = stones per pint × 0.0000295872698641
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per pint equals 13420.5598595 base units, and 1 pound per cubic millimeter equals 453592370 base units, so dividing one by the other gives the direct stone per pint-to-pound per cubic millimeter factor of 0.0000295872698641.
Simple example
1 st/pt × 0.00002958726986 = 0.0000295873 lb/mm3
1 stone per pint = 0.0000295873 pounds per cubic millimeter.
Real-world example
1,000 st/pt × 0.00002958726986 = 0.0295872699 lb/mm3
1,000 stones per pint = 0.0295872699 pounds per cubic millimeter.
Conversion table
| Stone per Pint (st/pt) | Pound per Cubic Millimeter (lb/mm3) |
|---|---|
| 0.1 st/pt | 0.0000029587 lb/mm3 |
| 1 st/pt | 0.0000295873 lb/mm3 |
| 10 st/pt | 0.0002958727 lb/mm3 |
| 100 st/pt | 0.002958727 lb/mm3 |
| 1,000 st/pt | 0.0295872699 lb/mm3 |
| 10,000 st/pt | 0.2958726986 lb/mm3 |
Reverse conversion: Pound per Cubic Millimeter to Stone per Pint
0.0000295873 lb/mm3 × 33798.3195 = 1.000001019 st/pt
0.0000295873 pounds per cubic millimeter = 1.000001019 stones per pint.
stones per pint = pounds per cubic millimeter × 33798.3195
For a page dedicated to this direction, see Pound per Cubic Millimeter to Stone per Pint.
Understanding the Stone per Pint (st/pt)
Mass per volume density.
Understanding the Pound per Cubic Millimeter (lb/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per cubic millimeter are in 1 stone per pint?
1 stone per pint equals 0.0000295873 pounds per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert stone per pint to pound per cubic millimeter?
Multiply the stone per pint value by 0.00002958726986. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic millimeter back to stone per pint?
Use the reverse factor: 1 pound per cubic millimeter equals 33,798.3195 stones per pint. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per pint?
Stone per Pint (st/pt) is a unit of density.
What is a pound per cubic millimeter?
Pound per Cubic Millimeter (lb/mm3) is a unit of density.
Is the stone per pint to pound per cubic millimeter conversion exact?
Yes. Both stone per pint and pound per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.00002958726986 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.