# Poise

Physical unit
Unit name Poise
Unit symbol ${\ displaystyle \ mathrm {P}}$
Physical quantity (s) dynamic viscosity
Formula symbol ${\ displaystyle \ eta _ {\ text {dyn}}}$
dimension ${\ displaystyle {\ mathsf {M \; L ^ {- 1} \; T ^ {- 1}}}}$
system CGS system of units
In SI units ${\ displaystyle \ mathrm {1 \, P = 0 {,} 1 \, \ {\ frac {kg} {m \, s}} = 0 {,} 1 \, Pa \, s}}$
In CGS units ${\ displaystyle \ mathrm {1 \, P = 1 \; {\ frac {g} {cm \ cdot s}}}}$
Named after Jean Léonard Marie Poiseuille
Derived from Centimeter , gram , second

The poise ( P ) is a non- legal unit of dynamic viscosity , named after the French physicist and doctor Jean Léonard Marie Poiseuille . The poise belongs to the CGS system of units and is defined as

${\ displaystyle 1 \ \ mathrm {P} = 1 \, \ mathrm {\ frac {g} {cm \ cdot s}}}$

The SI unit Pascal-Second (Pa · s) has been used in official and business transactions since 1978 . The conversion is:

${\ displaystyle 1 \ \ mathrm {P} = 0 {,} 1 \, \ mathrm {\ frac {kg} {m \ cdot s}} = 0 {,} 1 \ \ mathrm {Pa \ cdot s}}$

Another unit of viscosity in Anglo-Saxon countries was the Reyn .