poise is the cgs physical unit for dynamic viscosity. Unit is named after Jean Louis Marie Poiseuille. It is more commonly expressed, particularly in ASTM standards, as centipoise (cP). The centipoise is commonly used because water has a viscosity of 1.0020 cP (at 20 °C; the closeness to one is a convenient coincidence).
- 1 P = 1 g·cm−1·s−1
The relation between Poise and Pascal-second is:
- 10 P = 1 kg·m−1·s−1 = 1 Pa·s
- 1 cP = 0.001 Pa·s = 1 mPa·s