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.
Pound per Cubic inch to Pound per Gallon
Convert pound per cubic inch (lb/in3) to pound per gallon (lb/gal) instantly with formula, conversion table, and FAQ.
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Convert pound per cubic inch (lb/in3) to pound per gallon (lb/gal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
Pound per Gallon (lb/gal) expresses mass in pound per unit volume in gallon, found by dividing a mass value by a volume value.
lb/gal = lb/in3 × 231
Results update instantly for Pound per Cubic inch to Pound per Gallon conversions.
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Formula
lb/gal = lb/in3 × 231
lb/in3 = lb/gal × 0.004329
Conversion table
| 1 lb/in3 | 231 lb/gal |
| 5 lb/in3 | 1155 lb/gal |
| 10 lb/in3 | 2310 lb/gal |
| 20 lb/in3 | 4620 lb/gal |
| 50 lb/in3 | 11550 lb/gal |
| 100 lb/in3 | 23100 lb/gal |
| 500 lb/in3 | 115500 lb/gal |
| 1000 lb/in3 | 231000 lb/gal |
Related conversions
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How the formula works
Both pound per cubic inch and pound per gallon measure the same physical quantity (mass per unit volume), so converting between them is a single multiplication. Multiply a value in pound per cubic inch by 231 to get pound per gallon. To reverse the conversion, multiply a pound per gallon value by 0.004329 to get back to pound per cubic inch.
Frequently asked questions
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.
What is Pound per Gallon (lb/gal)?
Pound per Gallon (lb/gal) expresses mass in pound per unit volume in gallon, found by dividing a mass value by a volume value.
How do I convert pound per cubic inch to pound per gallon?
Multiply the pound per cubic inch value by 231 to get the equivalent in pound per gallon. For example, 5 lb/in3 × 231 = 1155 lb/gal.
Is this conversion exact?
Yes. Both units are defined using fixed metric and imperial conversion constants, so the factor 231 is an exact, non-rounded value.
Can I convert pound per gallon back to pound per cubic inch?
Yes. Divide the pound per gallon value by 231, or multiply it by 0.004329, to get pound per cubic inch.
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About converting pound per cubic inch to pound per gallon
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. Pound per Gallon (lb/gal) expresses mass in pound per unit volume in gallon, found by dividing a mass value by a volume value.
Use this calculator to move between pound per cubic inch and pound per gallon accurately for science, engineering, manufacturing, or everyday density calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.