Convert Pounds per foot-second to Pounds per inch-second
Convert Pounds per foot-second (lb/(ft·s)) to Pounds per inch-second (lb/(in·s)) instantly and accurately.
Conversion Formula
lb/(in·s) = lb/(ft·s) × 0.08333333333
About Pounds per foot-second
The pound per foot-second (lb/(ft·s)) equals 0.45359237/0.3048 ≈ 1.4882 Pa·s, the absolute viscosity unit in the foot-pound-second (FPS) system. It appears in legacy US chemical engineering textbooks and fluid mechanics problems stated in USC units. A heavy fuel oil at 50 °C with viscosity 0.050 Pa·s = 0.0336 lb/(ft·s). 1 lb/(ft·s) ≈ 1.4882 Pa·s = 14.882 P.
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
| Pounds per foot-second (lb/(ft·s)) | Pounds per inch-second (lb/(in·s)) |
|---|---|
| 1 lb/(ft·s) | 0.0833333 lb/(in·s) |
| 2 lb/(ft·s) | 0.166667 lb/(in·s) |
| 5 lb/(ft·s) | 0.416667 lb/(in·s) |
| 10 lb/(ft·s) | 0.833333 lb/(in·s) |
| 25 lb/(ft·s) | 2.08333 lb/(in·s) |
| 50 lb/(ft·s) | 4.16667 lb/(in·s) |
| 100 lb/(ft·s) | 8.33333 lb/(in·s) |