Quantity | Symbol | Gaussian & cgs emu^{a} |
Conversion factor, C ^{b} |
SI & rationalized mks^{c} |

Magnetic flux density, magnetic induction | B |
gauss (G)^{d} |
10^{-4} |
tesla (T), Wb/m^{2} |

Magnetic flux | F | maxwell (Mx), G·cm^{2} |
10^{-8} |
Weber (Wb), Volt·second (V·s) |

Magnetic potential difference, magnetomotive force | U, F |
gilbert(Gb) | 10/4p | ampere (A) |

Magnetic field strength, magnetizing force | H |
oersted (Oe),^{e} Gb/cm |
10^{3}/4p |
A/m^{f} |

Volume magnetization^{g} |
M |
emu/cm^{3h} |
10^{3} |
A/m |

Volume magnetization | 4pM |
G | 10^{3}/4p |
A/m |

Magnetic polarization, intensity of magnetization | J, I |
emu/cm^{3h} |
4p×10^{-4} |
T, Wb/m^{2i} |

(Mass) magnetization | s,M |
emu/g | 1 4p¥10 ^{-7} |
A·m^{2}/kgWb·m/kg |

Magnetic moment | m |
emu, erg/G | 10^{-3} |
A·m^{2}, joule per tesla (J/T) |

Magnetic dipole moment | j |
emu, erg/G | 4p¥10^{-18} |
Wb·m^{i} |

Volume susceptibility | c, k | dimensionless, emu/cm^{3} |
4p (4p) ^{2}¥10^{-7} |
dimensionless henry per meter (H/m), Wb/(A·m) |

Mass susceptibility | c_{r}, k_{r} |
cm^{3}/g, emu/g |
4p¥10^{-3}(4p) ^{2}
¥10^{-10} |
m^{3}/kgH·m ^{2}/kg |

Molar susceptibility | c_{mol},
k_{mol} |
cm^{3}/mol, emu/mol |
4p¥10^{-6}(4p) ^{2}¥
10^{-13} |
m^{3}/molH·m ^{2}/mol |

Permeability | m | dimensionless | 4p¥10^{-7} |
H/m, Wb/(A·m) |

Relative Permeability | m_{r} |
not defined | dimensionless | |

(Volume) energy density, energy product ^{k} |
W |
erg/cm^{3} |
10^{-1} |
J/m^{3} |

Demagnetization factor | D,N |
dimensionless | 1/4p | dimensionless |

R.B. Goldfarb and F.R. Ficket, U.S. Department of Commerce, National Bureau of Standards, Boulder, Colorado 80303, March 1985

NBS Special Publication 696 For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington D.C. 20402

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