Convert Pounds per foot-second to Pound-force seconds per square inch
Convert Pounds per foot-second (lb/(ft·s)) to Pound-force seconds per square inch (lbf·s/in²) instantly and accurately.
Conversion Formula
lbf·s/in² = lb/(ft·s) × 0.0002158399317
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 inch
The pound-force second per square inch (lbf·s/in², reyn) equals 144 × 47.880 ≈ 6 894.8 Pa·s. Informally called the "reyn" (after Osborne Reynolds), it is used in US tribology and bearing-design engineering, where oil-film viscosity in heavily loaded contacts is stated in reyn. Turbine bearing oils at operating temperature range 0.5-3 × 10⁻⁶ reyn. 1 reyn ≈ 6 894.8 Pa·s.
Quick Reference Table
| Pounds per foot-second (lb/(ft·s)) | Pound-force seconds per square inch (lbf·s/in²) |
|---|---|
| 1 lb/(ft·s) | 0.00021584 lbf·s/in² |
| 2 lb/(ft·s) | 0.00043168 lbf·s/in² |
| 5 lb/(ft·s) | 0.0010792 lbf·s/in² |
| 10 lb/(ft·s) | 0.0021584 lbf·s/in² |
| 25 lb/(ft·s) | 0.005396 lbf·s/in² |
| 50 lb/(ft·s) | 0.010792 lbf·s/in² |
| 100 lb/(ft·s) | 0.021584 lbf·s/in² |