Convert Pounds per cubic foot to Pounds per US gallon
Convert Pounds per cubic foot (lb/ft³) to Pounds per US gallon (lb/gal (US)) instantly and accurately.
Conversion Formula
lb/gal (US) = lb/ft³ × 0.1336805556
About Pounds per cubic foot
The pound per cubic foot (lb/ft³) equals ≈16.018 kg/m³, widely used in US construction, soil mechanics, and insulation specifications. Softwood framing lumber averages 25-35 lb/ft³; compacted soil 90-130 lb/ft³; fresh water ≈62.43 lb/ft³; concrete 145-150 lb/ft³. ASTM standards for concrete, soil, and geotextiles routinely cite lb/ft³. 1 lb/ft³ = 0.45359237/0.028316846592 kg/m³ ≈16.018 kg/m³.
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.
Quick Reference Table
| Pounds per cubic foot (lb/ft³) | Pounds per US gallon (lb/gal (US)) |
|---|---|
| 1 lb/ft³ | 0.133681 lb/gal (US) |
| 2 lb/ft³ | 0.267361 lb/gal (US) |
| 5 lb/ft³ | 0.668403 lb/gal (US) |
| 10 lb/ft³ | 1.33681 lb/gal (US) |
| 25 lb/ft³ | 3.34201 lb/gal (US) |
| 50 lb/ft³ | 6.68403 lb/gal (US) |
| 100 lb/ft³ | 13.3681 lb/gal (US) |