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 |
|
