Convert Pound-force seconds per square inch to Micropascal-seconds
Convert Pound-force seconds per square inch (lbf·s/in²) to Micropascal-seconds (µPa·s) instantly and accurately.
Conversion Formula
µPa·s = lbf·s/in² × 6894757293
About Pound-force seconds per square inch
The pound-force second per square inch (lbf·s/in², reyn) equals 144 × 47.880 ≈ 6 894.8 Pa·s. Informally called the "reyn" (after Osborne Reynolds), it is used in US tribology and bearing-design engineering, where oil-film viscosity in heavily loaded contacts is stated in reyn. Turbine bearing oils at operating temperature range 0.5-3 × 10⁻⁶ reyn. 1 reyn ≈ 6 894.8 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
| Pound-force seconds per square inch (lbf·s/in²) | Micropascal-seconds (µPa·s) |
|---|---|
| 1 lbf·s/in² | 6.895 × 109 µPa·s |
| 2 lbf·s/in² | 1.379 × 1010 µPa·s |
| 5 lbf·s/in² | 3.447 × 1010 µPa·s |
| 10 lbf·s/in² | 6.895 × 1010 µPa·s |
| 25 lbf·s/in² | 1.724 × 1011 µPa·s |
| 50 lbf·s/in² | 3.447 × 1011 µPa·s |
| 100 lbf·s/in² | 6.895 × 1011 µPa·s |