Convert Pounds per inch-second to Pounds per foot-hour
Convert Pounds per inch-second (lb/(in·s)) to Pounds per foot-hour (lb/(ft·h)) instantly and accurately.
Conversion Formula
lb/(ft·h) = lb/(in·s) × 43200
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).
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
| Pounds per inch-second (lb/(in·s)) | Pounds per foot-hour (lb/(ft·h)) |
|---|---|
| 1 lb/(in·s) | 43200 lb/(ft·h) |
| 2 lb/(in·s) | 86400 lb/(ft·h) |
| 5 lb/(in·s) | 216000 lb/(ft·h) |
| 10 lb/(in·s) | 432000 lb/(ft·h) |
| 25 lb/(in·s) | 1080000 lb/(ft·h) |
| 50 lb/(in·s) | 2160000 lb/(ft·h) |
| 100 lb/(in·s) | 4320000 lb/(ft·h) |