Convert Pounds per US gallon to Pounds per cubic inch
Convert Pounds per US gallon (lb/gal (US)) to Pounds per cubic inch (lb/in³) instantly and accurately.
Conversion Formula
lb/in³ = lb/gal (US) × 0.004329004329
About Pounds per US gallon
The pound per US gallon (lb/gal US) equals ≈119.826 kg/m³, the standard density unit in US petroleum refining, drilling, and petrochemical industries. Water at 60°F is 8.337 lb/gal; diesel 6.8-7.3 lb/gal; medium crude oil 7.1-8.0 lb/gal. Drilling mud weight per API RP 13B is specified in lb/gal (US) to control wellbore pressure. 1 lb/gal (US) ≈119.826 kg/m³ ≈7.481 lb/ft³.
About Pounds per cubic inch
The pound per cubic inch (lb/in³) equals ≈27 679.9 kg/m³, the standard US customary unit for engineering material density. Mechanical engineering handbooks list metals in lb/in³: steel 0.284, aluminium 0.098, copper 0.324, tungsten 0.697, lead 0.410. FEA software (ANSYS, Nastran) configured with US unit sets reads material density as lb/in³. 1 lb/in³ = 1728 lb/ft³ = 16 oz/in³ ≈27 679.9 kg/m³.
Quick Reference Table
| Pounds per US gallon (lb/gal (US)) | Pounds per cubic inch (lb/in³) |
|---|---|
| 1 lb/gal (US) | 0.004329 lb/in³ |
| 2 lb/gal (US) | 0.00865801 lb/in³ |
| 5 lb/gal (US) | 0.021645 lb/in³ |
| 10 lb/gal (US) | 0.04329 lb/in³ |
| 25 lb/gal (US) | 0.108225 lb/in³ |
| 50 lb/gal (US) | 0.21645 lb/in³ |
| 100 lb/gal (US) | 0.4329 lb/in³ |