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MAGNETIC FLUX DENSITY UNIT 
MAGNETIC FIELD STRENGTH UNIT

QUANTITY  SYMBOL  SI UNIT  SI EQUATION  CGS UNIT  CGS EQUATION  CONVERSION FACTOR 
Magnetic induction 
B  tesla (T)  B=µ_{o}(H+M)  gauss (G)  B = H+4πM  1 T = 10^{4} G 
Magnetic field strength  H  ampere/meter (A/m) 
H
= N×I/lc ( lc  magnetic path, m) 
oersted (Oe)  H
= 0.4πN×I/lc (lc  magnetic path, cm) 
1 A/m = 4π×10^{3} Oe 
Magnetic flux  Φ  weber (Wb)  Φ
=
B×Ac (Ac  area, m^{2} ) 
maxwell (M)  Φ
=
B×Ac (Ac area, cm^{2}) 
1 Wb = 10^{8} M 
Magnetization  M  ampere/meter (A/m)  M=m/V (m total magnetic moment, V volume, m^{3 }) 
emu/cm^{3}  M=m/V (m total magnetic moment, V volume, cm^{3 }) 
1
A/m = 10^{3} emu / cm^{3} 
Magnetic permeability of vacuum 
µ_{o}  newton/ampere^{2}^{ }  µ_{o}= 4π×10^{7}  1    4π×10^{7} 
Inductance  L  henry  L=μ_{o}μN^{2}Ac/lc (Ac area, m^{2}, lc  magnetic path, m) 
henry  L=0.4πμN^{2}Ac/lc×10^{8
}(Acarea, cm^{2}, lc  magnetic path, cm) 
1 
Emf (voltage)  V  volt  V=N×dΦ/dt 
volt  V=10^{8}N×dΦ/dt 
1 
Note: in the above equations: N turns, I  current (in amps) 