# Electrical Units

Step into the electrifying realm of Electrical Units Online. From the spark of volts to the resistance of ohms, we demystify the complex tapestry of electrical measurements. A haven for learners and experts, we light the way to understanding every unit!

## Electrical & electronic units table

Unit Name Unit Symbol Quantity
Ampere (amp) A Electric current (I)
Volt V Voltage (V, E)

Electromotive force (E)

Potential difference (Δφ)

Ohm Ω Resistance (R)
Watt W Electric power (P)
Decibel-milliwatt dBm Electric power (P)
Decibel-Watt dBW Electric power (P)
Volt-Ampere-Reactive var Reactive power (Q)
Volt-Ampere VA Apparent power (S)
Henry H Inductance (L)
siemens / mho S Conductance (G)

Coulomb C Electric charge (Q)
Ampere-hour Ah Electric charge (Q)
Joule J Energy (E)
Kilowatt-hour kWh Energy (E)
Electron-volt eV Energy (E)
Ohm-meter Ω∙m Resistivity ( ρ)
siemens per meter S/m Conductivity ( σ)
Volts per meter V/m Electric field (E)
Newtons per coulomb N/C Electric field (E)
Volt-meter V⋅m Electric flux (Φ e)
Tesla T Magnetic field (B)
Gauss G Magnetic field (B)
Weber Wb Magnetic flux (Φ m)
Hertz Hz Frequency (f)
Seconds s Time (t)
Meter / metre m Length (l)
Square-meter m 2 Area (A)
Decibel dB
Parts per million ppm

## Units prefix table

Prefix

Prefix

Symbol

Prefix

factor

Example
pico p 10 -12 1pF = 10 -12 F
nano n 10 -9 1nF = 10 -9 F
micro μ 10 -6 1μA = 10 -6 A
milli m 10 -3 1mA = 10 -3 A
kilo k 10 3 1kΩ = 1000Ω
mega M 10 6 1MHz = 10 6 Hz
giga G 10 9 1GHz = 10 9 Hz

Understanding Electrical Units

Volt (V):
A volt signifies voltage. It's defined as the energy usage of 1 joule when 1 coulomb of electric charge circulates within a circuit. 1V = 1J/C

Ampere (A):
Ampere measures electrical current, quantifying the electrical charge flowing in a circuit every second. 1A = 1C/s

Ohm (Ω):
Ohm represents electrical resistance, calculated as: 1Ω = 1V/1A

Watt (W):
Watt evaluates electric power, denoting the energy consumption rate. 1W = 1J/s = 1V ⋅ 1A

Decibel-milliwatt (dBm):
dBm is a power unit, gauged on a logarithmic scale, anchored to 1mW. 10dBm = 10 ⋅ log10(10mW/1mW)

Decibel-Watt (dBW):
dBW also measures electric power but references 1W. 10dBW = 10 ⋅ log10(10W/1W)

Farad assesses capacitance, indicating electric charge storage per volt. 1F = 1C/1V

Henry (H):
Henry is synonymous with inductance. 1H = 1Wb/1A

Siemens (S):
Siemens gauges conductance, essentially being the antithesis of resistance. 1S = 1/1Ω

Coulomb (C):
Coulomb stands for electric charge, equivalent to 6.238792×10^18 electron charges.

Ampere-hour (Ah):
This unit denotes electric charge, signifying the charge flowing in a circuit with a 1-ampere current over 1 hour. 1Ah = 1A ⋅ 1 hour = 3600C

Tesla (T):
Tesla quantifies the magnetic field. 1T = 1Wb/1m^2

Weber (Wb):
Weber stands for magnetic flux. 1Wb = 1V ⋅ 1s

Joule (J):
Joule is an energy measure. 1J = 1 kg ⋅ m^2/s^2

Kilowatt-hour (kWh):
This unit measures energy. 1kWh = 1kW ⋅ 1h = 1000W ⋅ 1h

Kilovolt-amps (kVA):
Kilovolt-amps quantify power. 1kVA = 1kV ⋅ 1A

Hertz (Hz):
Hertz determines frequency, measuring cycle counts each second. 1 Hz = 1 cycle/s

How do you find electrical units?

Electrical Units Online provides a comprehensive overview of various electrical units like volts, amps, ohms, and watts. It serves as a reference for their definitions, relationships, and applications in real-world scenarios.