Convert Slugs per cubic foot to Pounds per US gallon
Convert Slugs per cubic foot (slug/ft³) to Pounds per US gallon (lb/gal (US)) instantly and accurately.
Conversion Formula
lb/gal (US) = slug/ft³ × 4.301044685
About Slugs per cubic foot
The slug per cubic foot (slug/ft³) equals ≈515.379 kg/m³, used in US customary dynamics where forces are in pound-force. The US Standard Atmosphere gives sea-level air density as 2.377 × 10⁻³ slug/ft³; it appears in pre-SI aerospace textbooks (NACA technical notes) and compressible flow equations. 1 slug ≈14.594 kg. 1 slug/ft³ ≈515.379 kg/m³ ≈32.174 lb/ft³.
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
| Slugs per cubic foot (slug/ft³) | Pounds per US gallon (lb/gal (US)) |
|---|---|
| 1 slug/ft³ | 4.30104 lb/gal (US) |
| 2 slug/ft³ | 8.60209 lb/gal (US) |
| 5 slug/ft³ | 21.5052 lb/gal (US) |
| 10 slug/ft³ | 43.0104 lb/gal (US) |
| 25 slug/ft³ | 107.526 lb/gal (US) |
| 50 slug/ft³ | 215.052 lb/gal (US) |
| 100 slug/ft³ | 430.104 lb/gal (US) |