Gaussian units

Conversion of electric units

Symbol	Property	SI Unit	Factor	Gaussian
I	Electric current	ampere (A)	10c	statampere (statA)
Q	Charge	coulomb(C)	10c	statcoulomb (statC)
V	Electric potential	volt (V)	106/c	statvolt (statV)
R	Resistance	ohm (Ω)	105/c2	statohm (statΩ)
G	Conductance	siemens (S)	10−5c2	statsiemens (statS)
L	Self-inductance	henry (H)	105/c2	abhenry (abH)
C	Capacitance	farad (F)	10−5c2	cm
E	Electric field	V/m	104/c	statV/cm
ρ	Electric charge density	C/m3	c/105	statC/cm3
D	Electric displacement	C/m2	4π10-3c	statV/cm

c is the speed of light in m/s (≈ 3⋅10⁸ m/s).
Example: 1 A = 10c statA.

Conversion of magnetic units

Gaussian units are the same as cgs emu for magnetostatics.

Mx = maxwell, G = gauss, Oe = oersted ; Wb = weber, V = volt, s = second, T = tesla, m = meter, A = ampere, J = joule, kg = kilogram, H = henry

Symbol	Property	Gaussian → SI
Φ	magnetic flux	1 Mx → 10−8 Wb = 10−8 V⋅s
B	magnetic flux density	1 G → 10−4 T = 10−4 Wb/m2
	magnetic induction
H	magnetic field	1 Oe → 103/(4π) A/m
m	magnetic moment	1 erg/G = 1 emu → 10−3 A⋅m2 = 10−3 J/T
M	magnetization	1 erg/(G⋅cm3) = 1 emu/cm3 → 103 A/m
4πM	magnetization	1 G → 103/(4π) A/m
σ	mass magnetization	1 erg/(G⋅g) = 1 emu/g → 1 A⋅m2/kg
	specific magnetization
j	magnetic dipole moment	1 erg/G = 1 emu → 4π ⋅ 10−10 Wb⋅m
J	magnetic polarization	1 erg/(G⋅cm3) = 1 emu/cm3 → 4π ⋅ 10−4 T
χ, κ	susceptibility	1 → 4π
χρ	mass susceptibility	1 cm3/g → 4π ⋅ 10−3 m3/kg
μ	permeability	1 → 4π ⋅ 10−7 H/m = 4π ⋅ 10−7 Wb/(A⋅m)
μr	relative permeability	μ → μr
w, W	energy density	1 erg/cm3 → 10−1 J/m3
N, D	demagnetizing factor	1 → 1/(4π)