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Density and Mass

lb/galtolb/in³

Convert pounds per US gallon (lb/gal) to pounds per cubic inch (lb/in³).

Factor1 lb/gal = 0.004329004 lb/in³

Converter

lb/gal

Accepts numbers or expressions, e.g. 150 + 14.7

Result
0.0361039lb/in³

Rendered to 6 significant figures.

Formula

Formula
lb/in³ = lb/gal × 0.004329004

Multiply any value in pounds per US gallon by 0.004329004 to obtain the value in pounds per cubic inch.

Worked example

Convert 8.34 lb/gal to lb/in³.

  1. 01Start with 8.34 lb/gal.
  2. 02Multiply by the conversion factor: 8.34 × 0.004329004 = 0.0361039 lb/in³.
Result8.34 lb/gal = 0.0361039 lb/in³

Conversion table

lb/gallb/in³
10.004329
20.008658
50.021645
100.04329
200.08658
500.21645
1000.4329
2000.8658
5002.1645
10004.329

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lb/gal to lb/in³?
1 lb/gal equals 0.004329004 lb/in³. To convert, multiply the value in pounds per US gallon by 0.004329004.
How do I convert 1 lb/gal to lb/in³?
1 lb/gal = 0.004329 lb/in³. For any value, multiply by 0.004329004.
How do I convert lb/in³ back to lb/gal?
Divide by the same factor — or equivalently, multiply by 231. So 1 lb/in³ = 231 lb/gal.
When would I need to convert pound per US gallon to pound per cubic inch?
Density conversions are critical for fluid property datasheets, hydraulic head calculations, and reconciling lab measurements (often g/cm³) with process simulator inputs (kg/m³).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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