Pound per Cubic foot (lb/ft3) expresses mass in pound per unit volume in cubic foot, found by dividing a mass value by a volume value.
Pound per Cubic foot to Pound per Cubic inch
Convert pound per cubic foot (lb/ft3) to pound per cubic inch (lb/in3) instantly with formula, conversion table, and FAQ.
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Convert pound per cubic foot (lb/ft3) to pound per cubic inch (lb/in3) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
Pound per Cubic inch (lb/in3) expresses mass in pound per unit volume in cubic inch, found by dividing a mass value by a volume value.
lb/in3 = lb/ft3 × 0.000579
Results update instantly for Pound per Cubic foot to Pound per Cubic inch conversions.
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Formula
lb/in3 = lb/ft3 × 0.000579
lb/ft3 = lb/in3 × 1728
Conversion table
| 1 lb/ft3 | 0.000579 lb/in3 |
| 5 lb/ft3 | 0.002894 lb/in3 |
| 10 lb/ft3 | 0.005787 lb/in3 |
| 20 lb/ft3 | 0.011574 lb/in3 |
| 50 lb/ft3 | 0.028935 lb/in3 |
| 100 lb/ft3 | 0.05787 lb/in3 |
| 500 lb/ft3 | 0.289352 lb/in3 |
| 1000 lb/ft3 | 0.578704 lb/in3 |
Related conversions
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How the formula works
Both pound per cubic foot and pound per cubic inch measure the same physical quantity (mass per unit volume), so converting between them is a single multiplication. Multiply a value in pound per cubic foot by 0.000579 to get pound per cubic inch. To reverse the conversion, multiply a pound per cubic inch value by 1728 to get back to pound per cubic foot.
Frequently asked questions
What is Pound per Cubic foot (lb/ft3)?
Pound per Cubic foot (lb/ft3) expresses mass in pound per unit volume in cubic foot, found by dividing a mass value by a volume value.
What is Pound per Cubic inch (lb/in3)?
Pound per Cubic inch (lb/in3) expresses mass in pound per unit volume in cubic inch, found by dividing a mass value by a volume value.
How do I convert pound per cubic foot to pound per cubic inch?
Multiply the pound per cubic foot value by 0.000579 to get the equivalent in pound per cubic inch. For example, 5 lb/ft3 × 0.000579 = 0.002894 lb/in3.
Is this conversion exact?
Yes. Both units are defined using fixed metric and imperial conversion constants, so the factor 0.000579 is an exact, non-rounded value.
Can I convert pound per cubic inch back to pound per cubic foot?
Yes. Divide the pound per cubic inch value by 0.000579, or multiply it by 1728, to get pound per cubic foot.
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About converting pound per cubic foot to pound per cubic inch
Pound per Cubic foot (lb/ft3) expresses mass in pound per unit volume in cubic foot, found by dividing a mass value by a volume value. Pound per Cubic inch (lb/in3) expresses mass in pound per unit volume in cubic inch, found by dividing a mass value by a volume value.
Use this calculator to move between pound per cubic foot and pound per cubic inch accurately for science, engineering, manufacturing, or everyday density calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.