Table 4. Substitutional symbols for equations.

To convert an equation in Gaussian units to a corresponding equation in SI, replace the symbols in the column labeled Gaussian by the combination of symbols in the column labeled SI. Symbols representing quantities with units involving only volume, force, energy, and length transform directly.

Gaussian Quality	Gaussian symbol	SI symbol
flux density	B	$\sqrt{4\pi /{\mu }_0}\text{B}$
magnetic field	H	$\sqrt{4\pi {\mu }_0}\text{H}$
magnetization	M	$\begin{array}{l}\sqrt{{\mu }_0/4\pi }\text{M},\text{ or}\\ \sqrt{1/4\pi {\mu }_0}\text{J}\end{array}$
volume susceptibility	χ	(1/4π)κ
magnetic moment	m	$\sqrt{{\mu }_0/4\pi }\text{\hspace{0.17em}m}$