In SI system, permeability has the units

Permeability, $\mathrm{\mu }=\frac{\mathrm{B}}{\mathrm{H}}$

$\mathrm{S}.\mathrm{I} \mathrm{unitof} \mathrm{\mu }=\frac{ \mathrm{webermetre}{ }^{-2}}{ \mathrm{amperemetre}{ }^{-1}}$

                       =  $= \mathrm{webermetre}{ }^{-1} \mathrm{ampere}{ }^{-1}$