Convert Pounds per foot-hour to Pound-force seconds per square inch
Convert Pounds per foot-hour (lb/(ft·h)) to Pound-force seconds per square inch (lbf·s/in²) instantly and accurately.
Conversion Formula
lbf·s/in² = lb/(ft·h) × 5.995553660e-8
About Pounds per foot-hour
The pound per foot-hour (lb/(ft·h)) equals 0.45359237 / (0.3048 × 3600) ≈ 4.134×10⁻⁴ Pa·s. It appears in US heat-transfer and mass-transfer textbooks (e.g., McCabe, Smith & Harriott) where viscosity enters the Reynolds number using consistent hour-based units alongside BTU, ft, and lb quantities. Water at 20 °C is ≈2.42 lb/(ft·h). 1 lb/(ft·h) ≈ 4.134×10⁻⁴ Pa·s.
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-hour (lb/(ft·h)) | Pound-force seconds per square inch (lbf·s/in²) |
|---|---|
| 1 lb/(ft·h) | 5.996 × 10-8 lbf·s/in² |
| 2 lb/(ft·h) | 1.199 × 10-7 lbf·s/in² |
| 5 lb/(ft·h) | 2.998 × 10-7 lbf·s/in² |
| 10 lb/(ft·h) | 5.996 × 10-7 lbf·s/in² |
| 25 lb/(ft·h) | 1.499 × 10-6 lbf·s/in² |
| 50 lb/(ft·h) | 2.998 × 10-6 lbf·s/in² |
| 100 lb/(ft·h) | 5.996 × 10-6 lbf·s/in² |