Mass per volume density.
Kilogram per Cubic inches to Pounds per Cubic Millimeter Converter — kg/in3 to lb/mm3
Convert Kilogram per Cubic inch (kg/in3) to Pound per Cubic Millimeter (lb/mm3) using the exact conversion factor (1 kilogram per cubic inch = 0.0001345343 pound per cubic millimeter). See the formula, worked examples, and conversion table.
Kilogram per Cubic inches 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 61023.74409 / 4.5359237e+8.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilogram per Cubic inches to Pounds per Cubic Millimeter
Kilogram per Cubic inch 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 = kilogram per cubic inches × 0.000134534326701
This factor comes from each unit's defined relationship to the category's base unit: 1 kilogram per cubic inch equals 61023.7440947 base units, and 1 pound per cubic millimeter equals 453592370 base units, so dividing one by the other gives the direct kilogram per cubic inch-to-pound per cubic millimeter factor of 0.000134534326701.
Simple example
1 kg/in3 × 0.0001345343267 = 0.0001345343 lb/mm3
1 kilogram per cubic inch = 0.0001345343 pounds per cubic millimeter.
Real-world example
1,000 kg/in3 × 0.0001345343267 = 0.1345343267 lb/mm3
1,000 kilogram per cubic inches = 0.1345343267 pounds per cubic millimeter.
Conversion table
| Kilogram per Cubic inch (kg/in3) | Pound per Cubic Millimeter (lb/mm3) |
|---|---|
| 0.1 kg/in3 | 0.0000134534 lb/mm3 |
| 1 kg/in3 | 0.0001345343 lb/mm3 |
| 10 kg/in3 | 0.0013453433 lb/mm3 |
| 100 kg/in3 | 0.0134534327 lb/mm3 |
| 1,000 kg/in3 | 0.1345343267 lb/mm3 |
| 10,000 kg/in3 | 1.345343267 lb/mm3 |
Reverse conversion: Pound per Cubic Millimeter to Kilogram per Cubic inch
0.0001345343 lb/mm3 × 7433.047197 = 0.9999998015 kg/in3
0.0001345343 pounds per cubic millimeter = 0.9999998015 kilogram per cubic inches.
kilogram per cubic inches = pounds per cubic millimeter × 7433.0471971
For a page dedicated to this direction, see Pound per Cubic Millimeter to Kilogram per Cubic inch.
Understanding the Kilogram per Cubic inch (kg/in3)
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 kilogram per cubic inch?
1 kilogram per cubic inch equals 0.0001345343 pounds per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert kilogram per cubic inch to pound per cubic millimeter?
Multiply the kilogram per cubic inch value by 0.0001345343267. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic millimeter back to kilogram per cubic inch?
Use the reverse factor: 1 pound per cubic millimeter equals 7,433.047197 kilogram per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilogram per cubic inch?
Kilogram per Cubic inch (kg/in3) 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 kilogram per cubic inch to pound per cubic millimeter conversion exact?
Yes. Both kilogram per cubic inch and pound per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.0001345343267 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.