Convert Pounds per foot-hour to Pound-force seconds per square foot
Convert Pounds per foot-hour (lb/(ft·h)) to Pound-force seconds per square foot (lbf·s/ft²) instantly and accurately.
Conversion Formula
lbf·s/ft² = lb/(ft·h) × 8.633597270e-6
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 Pound-force seconds per square foot
The pound-force second per square foot (lbf·s/ft²) equals (9.80665 × 0.45359237) / 0.3048² ≈ 47.880 Pa·s, numerically identical to slug/(ft·s). It appears in US civil and structural engineering fluid mechanics, pump hydraulics texts, and older API pipeline standards. A key identity: 1 lbf·s/ft² = 1 slug/(ft·s) ≈ 47.880 Pa·s = 478.8 P.
Quick Reference Table
| Pounds per foot-hour (lb/(ft·h)) | Pound-force seconds per square foot (lbf·s/ft²) |
|---|---|
| 1 lb/(ft·h) | 8.634 × 10-6 lbf·s/ft² |
| 2 lb/(ft·h) | 1.727 × 10-5 lbf·s/ft² |
| 5 lb/(ft·h) | 4.317 × 10-5 lbf·s/ft² |
| 10 lb/(ft·h) | 8.634 × 10-5 lbf·s/ft² |
| 25 lb/(ft·h) | 0.00021584 lbf·s/ft² |
| 50 lb/(ft·h) | 0.00043168 lbf·s/ft² |
| 100 lb/(ft·h) | 0.00086336 lbf·s/ft² |