Convert Pounds per foot-hour to Pounds per foot-second
Convert Pounds per foot-hour (lb/(ft·h)) to Pounds per foot-second (lb/(ft·s)) instantly and accurately.
Conversion Formula
lb/(ft·s) = lb/(ft·h) × 0.0002777777778
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 foot-second
The pound per foot-second (lb/(ft·s)) equals 0.45359237/0.3048 ≈ 1.4882 Pa·s, the absolute viscosity unit in the foot-pound-second (FPS) system. It appears in legacy US chemical engineering textbooks and fluid mechanics problems stated in USC units. A heavy fuel oil at 50 °C with viscosity 0.050 Pa·s = 0.0336 lb/(ft·s). 1 lb/(ft·s) ≈ 1.4882 Pa·s = 14.882 P.
Quick Reference Table
| Pounds per foot-hour (lb/(ft·h)) | Pounds per foot-second (lb/(ft·s)) |
|---|---|
| 1 lb/(ft·h) | 0.000277778 lb/(ft·s) |
| 2 lb/(ft·h) | 0.000555556 lb/(ft·s) |
| 5 lb/(ft·h) | 0.00138889 lb/(ft·s) |
| 10 lb/(ft·h) | 0.00277778 lb/(ft·s) |
| 25 lb/(ft·h) | 0.00694444 lb/(ft·s) |
| 50 lb/(ft·h) | 0.0138889 lb/(ft·s) |
| 100 lb/(ft·h) | 0.0277778 lb/(ft·s) |