Convert Pound-force seconds per square inch to Pounds per foot-hour
Convert Pound-force seconds per square inch (lbf·s/in²) to Pounds per foot-hour (lb/(ft·h)) instantly and accurately.
Conversion Formula
lb/(ft·h) = lbf·s/in² × 16679026.77
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.
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.
Quick Reference Table
| Pound-force seconds per square inch (lbf·s/in²) | Pounds per foot-hour (lb/(ft·h)) |
|---|---|
| 1 lbf·s/in² | 16679000 lb/(ft·h) |
| 2 lbf·s/in² | 33358100 lb/(ft·h) |
| 5 lbf·s/in² | 83395100 lb/(ft·h) |
| 10 lbf·s/in² | 166790000 lb/(ft·h) |
| 25 lbf·s/in² | 416976000 lb/(ft·h) |
| 50 lbf·s/in² | 833951000 lb/(ft·h) |
| 100 lbf·s/in² | 1.668 × 109 lb/(ft·h) |