Mass per volume density.
Kilogram per Cubic inches to Pound per Cubic inches Converter — kg/in3 to lb/in3
Convert Kilogram per Cubic inch (kg/in3) to Pound per Cubic inch (lb/in3) using the exact conversion factor (1 kilogram per cubic inch = 2.204622622 pound per cubic inch). See the formula, worked examples, conversion table, and common uses.
Kilogram per Cubic inches to Pound per Cubic inches 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 / 27679.90471.
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 Pound per Cubic inches
Kilogram per Cubic inch and Pound per Cubic inch 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
pound per cubic inches = kilogram per cubic inches × 2.20462262185
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 inch equals 27679.9047102 base units, so dividing one by the other gives the direct kilogram per cubic inch-to-pound per cubic inch factor of 2.20462262185.
Simple example
1 kg/in3 × 2.204622622 = 2.204622622 lb/in3
1 kilogram per cubic inch = 2.204622622 pound per cubic inches.
Real-world example
1,000 kg/in3 × 2.204622622 = 2,204.622622 lb/in3
1,000 kilogram per cubic inches = 2,204.622622 pound per cubic inches.
Conversion table
| Kilogram per Cubic inch (kg/in3) | Pound per Cubic inch (lb/in3) |
|---|---|
| 0.1 kg/in3 | 0.2204622622 lb/in3 |
| 1 kg/in3 | 2.204622622 lb/in3 |
| 10 kg/in3 | 22.04622622 lb/in3 |
| 100 kg/in3 | 220.4622622 lb/in3 |
| 1,000 kg/in3 | 2,204.622622 lb/in3 |
| 10,000 kg/in3 | 22,046.22622 lb/in3 |
Reverse conversion: Pound per Cubic inch to Kilogram per Cubic inch
2.204622622 lb/in3 × 0.45359237 = 1 kg/in3
2.204622622 pound per cubic inches = 1 kilogram per cubic inches.
kilogram per cubic inches = pound per cubic inches × 0.45359237
For a page dedicated to this direction, see Pound per Cubic inch to Kilogram per Cubic inch.
Understanding the Kilogram per Cubic inch (kg/in3)
Mass per volume density.
Understanding the Pound per Cubic inch
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Where it's used: United States
Uses of the Pound per Cubic inch today
- Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure
Pound per Cubic inch — sources
- US materials-engineering reference tables — Pounds per cubic inch is a commonly tabulated density unit for metals in US machining and materials references.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pound per cubic inches are in 1 kilogram per cubic inch?
1 kilogram per cubic inch equals 2.204622622 pound per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert kilogram per cubic inch to pound per cubic inch?
Multiply the kilogram per cubic inch value by 2.204622622. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic inch back to kilogram per cubic inch?
Use the reverse factor: 1 pound per cubic inch equals 0.45359237 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 inch?
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Is the kilogram per cubic inch to pound per cubic inch conversion exact?
Yes. Both kilogram per cubic inch and pound per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 2.204622622 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.