Magnetic Constant

${\mu }_0=1.25663706\cdot 10^{-6}\mathrm{m}\mathrm{kg}{\mathrm{s}}^{-2}{\mathrm{A}}^{-2}=4\pi \cdot 10^{-7}\frac{\mathrm{N}}{{\mathrm{A}}^2}$

• $A$ is amperes