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Perm (23°C) (perm (23 °C)) is a unit in the category of Permeability. It is also known as perms. This unit is commonly used in the US unit system. Perm (23°C) (perm (23 °C)) has a dimension of L^-1T where L is length, and T is time. It can be converted to the corresponding standard SI unit kg/N-s by multiplying its value by a factor of 5.74525E-011.

Note that the seven base dimensions are M (Mass), L (Length), T (Time), Q (Temperature), N (Aamount of Substance), I (Electric Current), and J (Luminous Intensity).

Other units in the category of Permeability include Grain Per Hour Per Square Foot Per Inch of Mercury (0°C) (grain/hr-ft²-inHg (0 °C)), Kilogram Per Newton Per Second (kg/N-s), and Perm (0°C) (perm (0 °C)).