Convert Pound-force seconds per square foot to Slugs per foot-second
Convert Pound-force seconds per square foot (lbf·s/ft²) to Slugs per foot-second (slug/(ft·s)) instantly and accurately.
Conversion Formula
slug/(ft·s) = lbf·s/ft² × 1
About Pound-force seconds per square foot
The pound-force second per square foot (lbf·s/ft²) equals (9.80665 × 0.45359237) / 0.3048² ≈ 47.880 Pa·s, numerically identical to slug/(ft·s). It appears in US civil and structural engineering fluid mechanics, pump hydraulics texts, and older API pipeline standards. A key identity: 1 lbf·s/ft² = 1 slug/(ft·s) ≈ 47.880 Pa·s = 478.8 P.
About Slugs per foot-second
The slug per foot-second (slug/(ft·s)) equals 1 lbf·s/ft² ≈ 47.880 Pa·s, the coherent FPS viscosity unit where force is in pound-force. It is used in US aerospace and hydraulic engineering when working with the slug as the unit of mass. Water at 20 °C has a viscosity of ≈2.09×10⁻⁵ slug/(ft·s); hydraulic fluid MIL-PRF-5606 is ≈3×10⁻⁴ slug/(ft·s) at 100 °F. 1 slug/(ft·s) ≈ 47.880 Pa·s.
Quick Reference Table
| Pound-force seconds per square foot (lbf·s/ft²) | Slugs per foot-second (slug/(ft·s)) |
|---|---|
| 1 lbf·s/ft² | 1 slug/(ft·s) |
| 2 lbf·s/ft² | 2 slug/(ft·s) |
| 5 lbf·s/ft² | 5 slug/(ft·s) |
| 10 lbf·s/ft² | 10 slug/(ft·s) |
| 25 lbf·s/ft² | 25 slug/(ft·s) |
| 50 lbf·s/ft² | 50 slug/(ft·s) |
| 100 lbf·s/ft² | 100 slug/(ft·s) |