Convert Pounds per cubic foot to Slugs per cubic foot
Convert Pounds per cubic foot (lb/ft³) to Slugs per cubic foot (slug/ft³) instantly and accurately.
Conversion Formula
slug/ft³ = lb/ft³ × 0.03108095017
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 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.
Quick Reference Table
| Pounds per cubic foot (lb/ft³) | Slugs per cubic foot (slug/ft³) |
|---|---|
| 1 lb/ft³ | 0.031081 slug/ft³ |
| 2 lb/ft³ | 0.0621619 slug/ft³ |
| 5 lb/ft³ | 0.155405 slug/ft³ |
| 10 lb/ft³ | 0.31081 slug/ft³ |
| 25 lb/ft³ | 0.777024 slug/ft³ |
| 50 lb/ft³ | 1.55405 slug/ft³ |
| 100 lb/ft³ | 3.1081 slug/ft³ |