Convert Pounds per foot-second to Pound-force seconds per square foot
Convert Pounds per foot-second (lb/(ft·s)) to Pound-force seconds per square foot (lbf·s/ft²) instantly and accurately.
Conversion Formula
lbf·s/ft² = lb/(ft·s) × 0.03108095017
About Pounds per foot-second
The pound per foot-second (lb/(ft·s)) equals 0.45359237/0.3048 ≈ 1.4882 Pa·s, the absolute viscosity unit in the foot-pound-second (FPS) system. It appears in legacy US chemical engineering textbooks and fluid mechanics problems stated in USC units. A heavy fuel oil at 50 °C with viscosity 0.050 Pa·s = 0.0336 lb/(ft·s). 1 lb/(ft·s) ≈ 1.4882 Pa·s = 14.882 P.
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.
Quick Reference Table
| Pounds per foot-second (lb/(ft·s)) | Pound-force seconds per square foot (lbf·s/ft²) |
|---|---|
| 1 lb/(ft·s) | 0.031081 lbf·s/ft² |
| 2 lb/(ft·s) | 0.0621619 lbf·s/ft² |
| 5 lb/(ft·s) | 0.155405 lbf·s/ft² |
| 10 lb/(ft·s) | 0.31081 lbf·s/ft² |
| 25 lb/(ft·s) | 0.777024 lbf·s/ft² |
| 50 lb/(ft·s) | 1.55405 lbf·s/ft² |
| 100 lb/(ft·s) | 3.1081 lbf·s/ft² |