Convert Poises to Pounds per foot-second
Convert Poises (P) to Pounds per foot-second (lb/(ft·s)) instantly and accurately.
Conversion Formula
lb/(ft·s) = P × 0.06719689751
About Poises
The poise (P) equals 0.1 Pa·s (exact), defined in the CGS system as 1 g/(cm·s). Named after Jean Louis Marie Poiseuille, it was the dominant viscosity unit before SI adoption. Fluid-mechanics textbooks and older ASTM and API data tables still list viscosities in P. Motor oil at 100 °C is ≈0.02-0.05 P; water at 20 °C is ≈0.01 P (= 1 cP). 1 P = 0.1 Pa·s = 100 cP.
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.
Quick Reference Table
| Poises (P) | Pounds per foot-second (lb/(ft·s)) |
|---|---|
| 1 P | 0.0671969 lb/(ft·s) |
| 2 P | 0.134394 lb/(ft·s) |
| 5 P | 0.335984 lb/(ft·s) |
| 10 P | 0.671969 lb/(ft·s) |
| 25 P | 1.67992 lb/(ft·s) |
| 50 P | 3.35984 lb/(ft·s) |
| 100 P | 6.71969 lb/(ft·s) |