Convert Pound-force seconds per square inch to Slugs per foot-second
Convert Pound-force seconds per square inch (lbf·s/in²) to Slugs per foot-second (slug/(ft·s)) instantly and accurately.
Conversion Formula
slug/(ft·s) = lbf·s/in² × 144
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 Slugs per foot-second
The slug per foot-second (slug/(ft·s)) equals 1 lbf·s/ft² ≈ 47.880 Pa·s, the coherent FPS viscosity unit where force is in pound-force. It is used in US aerospace and hydraulic engineering when working with the slug as the unit of mass. Water at 20 °C has a viscosity of ≈2.09×10⁻⁵ slug/(ft·s); hydraulic fluid MIL-PRF-5606 is ≈3×10⁻⁴ slug/(ft·s) at 100 °F. 1 slug/(ft·s) ≈ 47.880 Pa·s.
Quick Reference Table
| Pound-force seconds per square inch (lbf·s/in²) | Slugs per foot-second (slug/(ft·s)) |
|---|---|
| 1 lbf·s/in² | 144 slug/(ft·s) |
| 2 lbf·s/in² | 288 slug/(ft·s) |
| 5 lbf·s/in² | 720 slug/(ft·s) |
| 10 lbf·s/in² | 1440 slug/(ft·s) |
| 25 lbf·s/in² | 3600 slug/(ft·s) |
| 50 lbf·s/in² | 7200 slug/(ft·s) |
| 100 lbf·s/in² | 14400 slug/(ft·s) |