Convert Pounds per foot-hour to Pounds per inch-second
Convert Pounds per foot-hour (lb/(ft·h)) to Pounds per inch-second (lb/(in·s)) instantly and accurately.
Conversion Formula
lb/(in·s) = lb/(ft·h) × 2.314814815e-5
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 Pounds per inch-second
The pound per inch-second (lb/(in·s)) equals 0.45359237/0.0254 ≈ 17.858 Pa·s, used in plastics extrusion and rubber compounding industries where inch-based dimensions are combined with mass-based flow analysis. Polymer melt viscosities at processing temperatures are sometimes quoted in lb/(in·s) in older US extrusion equipment manuals. 1 lb/(in·s) ≈ 17.858 Pa·s = 12 lb/(ft·s).
Quick Reference Table
| Pounds per foot-hour (lb/(ft·h)) | Pounds per inch-second (lb/(in·s)) |
|---|---|
| 1 lb/(ft·h) | 2.315 × 10-5 lb/(in·s) |
| 2 lb/(ft·h) | 4.63 × 10-5 lb/(in·s) |
| 5 lb/(ft·h) | 0.000115741 lb/(in·s) |
| 10 lb/(ft·h) | 0.000231481 lb/(in·s) |
| 25 lb/(ft·h) | 0.000578704 lb/(in·s) |
| 50 lb/(ft·h) | 0.00115741 lb/(in·s) |
| 100 lb/(ft·h) | 0.00231481 lb/(in·s) |