Mass per volume density.
Pounds per Cubic Meter to Short tons per Cubic Millimeter Converter — lb/m3 to ton/mm3
Convert Pound per Cubic Meter (lb/m3) to Short ton per Cubic Millimeter (ton/mm3) using the exact conversion factor (1 pound per cubic meter = 5e-13 short ton per cubic millimeter). See the formula, worked examples, and conversion table.
Pounds per Cubic Meter to Short tons 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 0.45359237 / 9.0718474e+11.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cubic Meter to Short tons per Cubic Millimeter
Pound per Cubic Meter and Short ton 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
short tons per cubic millimeter = pounds per cubic meter × 5e-13
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic meter equals 0.45359237 base units, and 1 short ton per cubic millimeter equals 907184740000 base units, so dividing one by the other gives the direct pound per cubic meter-to-short ton per cubic millimeter factor of 5e-13.
Simple example
1 lb/m3 × 5e-13 = 5e-13 ton/mm3
1 pound per cubic meter = 5e-13 short tons per cubic millimeter.
Real-world example
1,000 lb/m3 × 5e-13 = 5e-10 ton/mm3
1,000 pounds per cubic meter = 5e-10 short tons per cubic millimeter.
Conversion table
| Pound per Cubic Meter (lb/m3) | Short ton per Cubic Millimeter (ton/mm3) |
|---|---|
| 0.1 lb/m3 | 5e-14 ton/mm3 |
| 1 lb/m3 | 5e-13 ton/mm3 |
| 10 lb/m3 | 5e-12 ton/mm3 |
| 100 lb/m3 | 5e-11 ton/mm3 |
| 1,000 lb/m3 | 5e-10 ton/mm3 |
| 10,000 lb/m3 | 5e-9 ton/mm3 |
Reverse conversion: Short ton per Cubic Millimeter to Pound per Cubic Meter
5e-13 ton/mm3 × 2e+12 = 1 lb/m3
5e-13 short tons per cubic millimeter = 1 pounds per cubic meter.
pounds per cubic meter = short tons per cubic millimeter × 2e+12
For a page dedicated to this direction, see Short ton per Cubic Millimeter to Pound per Cubic Meter.
Understanding the Pound per Cubic Meter (lb/m3)
Mass per volume density.
Understanding the Short ton per Cubic Millimeter (ton/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many short tons per cubic millimeter are in 1 pound per cubic meter?
1 pound per cubic meter equals 5e-13 short tons per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic meter to short ton per cubic millimeter?
Multiply the pound per cubic meter value by 5e-13. The converter above does this instantly to whatever precision you set.
How do I convert short ton per cubic millimeter back to pound per cubic meter?
Use the reverse factor: 1 short ton per cubic millimeter equals 2e+12 pounds per cubic meter. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic meter?
Pound per Cubic Meter (lb/m3) is a unit of density.
What is a short ton per cubic millimeter?
Short ton per Cubic Millimeter (ton/mm3) is a unit of density.
Is the pound per cubic meter to short ton per cubic millimeter conversion exact?
Yes. Both pound per cubic meter and short ton per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 5e-13 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.