Convert Micropascal-seconds to Poises
Convert Micropascal-seconds (µPa·s) to Poises (P) instantly and accurately.
Conversion Formula
P = µPa·s × 1.000000000e-5
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.
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.
Quick Reference Table
| Micropascal-seconds (µPa·s) | Poises (P) |
|---|---|
| 1 µPa·s | 1 × 10-5 P |
| 2 µPa·s | 2 × 10-5 P |
| 5 µPa·s | 5 × 10-5 P |
| 10 µPa·s | 1 × 10-4 P |
| 25 µPa·s | 0.00025 P |
| 50 µPa·s | 0.0005 P |
| 100 µPa·s | 0.001 P |