# lb to in3 – pounds to cubic inches – mass to volume online

Mass (weight) in pounds (lb):

Density in

Volume in cubic inches (in³, cu in):

0.00in3

Density of some materials:

• Air ≈ 0.000043 lb/in3
• Aluminum ≈ 0.0975 lb/in3
• Concrete ≈ 0.0867 lb/in3
• Diesel ≈ 0.0307 lb/in3
• Gasoline (petrol) ≈ 0.02565 lb/in3
• Steel ≈ 0.2836 lb/in3
• Water (4°C) ≈ 0.03613 lb/in3

## How to convert from lb to in3?

The volume in cubic inches is equal to the mass (weight) in pounds divided by the density in pounds per cubic inch.

Formula:

V = m / p

V – volume in cubic inches (in3, cu in);

m – mass (weight) in pounds (lb);

ρ – density in pounds per cubic inch (lb/in3, lb/(cu in), lb in-3).

Example

Convert 100 lb to in3 if the density is 0.03613 lb/in3.

Solution: V = m / p = 100 / 0.03613 = 2767.8 in3. Answer: 100 lb = 2767.8 in3 (density = 0.03613 lb/in3)

In this calculator, density can be entered in the following units (click on density unit):

• kilogram per cubic meter (kg/m³, kg/(cu m))
• tons per cubic meter (t/m³, t/(cu m))
• grams per milliliter (g/mL)
• grams per cubic centimeter (g/cm³, g/(cu cm), g/cc)
• pound per cubic inch (lb/in³, lb/(cu in))
• pound per cubic foot (lb/ft³, lb/(cu ft), lb/(cf))
• pound per US liquid gallon (lb/US gal)
• ounce per cubic inch (oz/in³, oz/(cu in))
• ounce per cubic foot (oz/ft³, oz/(cu ft))
• slug per cubic foot (slug/ft³, slug/(cu ft), slug/cf)