Poise

The title of this article is ambiguous. For the French composer see Ferdinand 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 .