Convert Pound-force seconds per square foot to Micropascal-seconds
Convert Pound-force seconds per square foot (lbf·s/ft²) to Micropascal-seconds (µPa·s) instantly and accurately.
Conversion Formula
µPa·s = lbf·s/ft² × 47880258.98
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.
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
| Pound-force seconds per square foot (lbf·s/ft²) | Micropascal-seconds (µPa·s) |
|---|---|
| 1 lbf·s/ft² | 47880300 µPa·s |
| 2 lbf·s/ft² | 95760500 µPa·s |
| 5 lbf·s/ft² | 239401000 µPa·s |
| 10 lbf·s/ft² | 478803000 µPa·s |
| 25 lbf·s/ft² | 1.197 × 109 µPa·s |
| 50 lbf·s/ft² | 2.394 × 109 µPa·s |
| 100 lbf·s/ft² | 4.788 × 109 µPa·s |