Convert Pounds per foot-hour to Micropascal-seconds
Convert Pounds per foot-hour (lb/(ft·h)) to Micropascal-seconds (µPa·s) instantly and accurately.
Conversion Formula
µPa·s = lb/(ft·h) × 413.3788732
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 Micropascal-seconds
The micropascal-second (µPa·s) equals 10⁻⁶ Pa·s, the viscosity range of dilute gases at ambient conditions. Air at 20 °C has a dynamic viscosity of ≈18.5 µPa·s; helium ≈19.6 µPa·s; hydrogen ≈9.0 µPa·s. Gas turbine and aerodynamics calculations routinely work at this scale. 1 µPa·s = 10⁻⁶ Pa·s = 10⁻³ mPa·s = 10⁻⁵ cP.
Quick Reference Table
| Pounds per foot-hour (lb/(ft·h)) | Micropascal-seconds (µPa·s) |
|---|---|
| 1 lb/(ft·h) | 413.379 µPa·s |
| 2 lb/(ft·h) | 826.758 µPa·s |
| 5 lb/(ft·h) | 2066.89 µPa·s |
| 10 lb/(ft·h) | 4133.79 µPa·s |
| 25 lb/(ft·h) | 10334.5 µPa·s |
| 50 lb/(ft·h) | 20668.9 µPa·s |
| 100 lb/(ft·h) | 41337.9 µPa·s |