This list presents most of the units that you will encounter in electrical engineering applications and literature.
If you know of others that should be added, please send me an
e-mail.
Visit NIST for all constants, units,
and uncertainties. This is their Extensive
Listing of constants.
Here is a list of electrical constants.
Angular Frequency |
radians/second |
ω |
Admittance (Y) |
siemens |
S |
Capacitance (C) |
farad |
F |
Capacitive Reactance (XC) |
ohm |
Ω |
Center Frequency (Fc) |
hertz |
Hz |
Charge |
coulomb |
C |
Conductance (G) [] |
siemen [mho] |
S ()
[1/Ω] |
Conductivity (σ) |
siemens/meter |
S/m |
Current (I) |
ampere |
A |
Dipole Moment |
coulomb·meter |
p |
Electric Charge |
coulomb |
Q |
Electric Flux |
coulomb |
Ψ |
Electric Flux Density |
coulomb/meter2 |
D |
Electric Susceptibility |
1 |
χe |
Energy (E) |
joule |
J |
Frequency |
hertz |
Hz |
Impedance (Z) |
ohm |
Ω |
Inductance (L) |
henry |
H |
Inductive Reactance (XL) |
ohm |
Ω |
Joule |
watt·second |
J |
Linear Current Density |
amperes/meter2 |
A |
Magnetic Field |
tesla |
T |
Magnetic Flux |
weber |
Φ |
Magnetic Flux Linkage |
weber |
Λ |
Magnetic Flux Density |
tesla |
B |
Magnetic Susceptibility |
1 |
χμ |
Magnetic Vector Potential |
weber/meter |
A |
Magnetization |
ampere/meter |
M |
Magnetomotive Force |
weber |
Wb |
Mutual Inductance |
henry |
Li,j Mi,j |
Permeability |
henrys/meter |
μ |
Permittivity |
farads/meter |
ε |
Phase Angle |
radian |
Φ |
Phase Coefficient |
radian |
β |
Potential (V) |
volt |
V |
Power (P) |
watt |
W |
Reluctance (R) |
1/henrys |
1/H |
Reluctivity |
meters/henry |
ν |
Resistance (R) |
ohm |
Ω |
Resistivity (ρ) |
ohm·meter |
Ω*m |
Resonant Frequency (Fr) |
hertz |
Hz |
Surface Density of Charge |
coulombs/meter2 |
σ |
Susceptance (B) |
siemen |
S |
Volume Density of Charge |
coulombs/meter3 |
ρ |
Volume Resistivity |
ohms/meter3 |
ρ |
Wavelength |
meter |
λ |
|