Encyclopedia Magnetica™

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Conversion of emu (electromagnetic unit of magnetic moment) from CGS to SI units requires the following numerical scaling:

$$ 1 \bigg( emu = \frac{ \text{erg} } { \text{Oe} } \bigg)_{CGS} = 4·π·10^{-10} \bigg( \text{Wb·m} \bigg)_{SI} $$

Note: emu converted from CGS to SI still represents the magnetic dipole moment m but additionally multiplied by the absolute permeability of vacuum μ₀ (which is reflected in the resulting SI units).