Electrical Units - an overview

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.

Name (Symbol)       

Base Unit

Unit Symbol           

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

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