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Electrical Units

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.

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) [Mho symbol - RF Cafe] siemen [mho] S (Mho symbol - RF Cafe) [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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