Convert Pound-force seconds per square inch to Pounds per inch-second
Convert Pound-force seconds per square inch (lbf·s/in²) to Pounds per inch-second (lb/(in·s)) instantly and accurately.
Conversion Formula
lb/(in·s) = lbf·s/in² × 386.0885827
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 Pounds per inch-second
The pound per inch-second (lb/(in·s)) equals 0.45359237/0.0254 ≈ 17.858 Pa·s, used in plastics extrusion and rubber compounding industries where inch-based dimensions are combined with mass-based flow analysis. Polymer melt viscosities at processing temperatures are sometimes quoted in lb/(in·s) in older US extrusion equipment manuals. 1 lb/(in·s) ≈ 17.858 Pa·s = 12 lb/(ft·s).
Quick Reference Table
| Pound-force seconds per square inch (lbf·s/in²) | Pounds per inch-second (lb/(in·s)) |
|---|---|
| 1 lbf·s/in² | 386.089 lb/(in·s) |
| 2 lbf·s/in² | 772.177 lb/(in·s) |
| 5 lbf·s/in² | 1930.44 lb/(in·s) |
| 10 lbf·s/in² | 3860.89 lb/(in·s) |
| 25 lbf·s/in² | 9652.21 lb/(in·s) |
| 50 lbf·s/in² | 19304.4 lb/(in·s) |
| 100 lbf·s/in² | 38608.9 lb/(in·s) |