Dynamic viscosity has the dimension mass per length time. The SI composite unit of dynamic viscosity is the kilogram per meter second.

Maple knows the units of dynamic viscosity listed in the following table.

An asterisk ( * ) indicates the default context, an at sign (@) indicates an abbreviation, and under the prefixes column, SI indicates that the unit takes all SI prefixes, IEC indicates that the unit takes IEC prefixes, and SI+ and SI- indicate that the unit takes only positive and negative SI prefixes, respectively.  Refer to a unit in the Units package by indexing the name or symbol with the context, for example, poise[standard]; or, if the context is indicated as the default, by using only the unit name or symbol, for example, poise.

The units of dynamic viscosity are defined as follows.

A poise is defined as a dyne second per square meter.

A reyn is defined as a poundforce second per square inch.

A rhe is defined as an inverse poise.