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ELECTRICITY & ELECTRONICS UNITS
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Volt (V)
Volt definition
Volt is the electrical unit of voltage or potential difference (symbol: V).
One Volt is defined as energy consumption of one joule per electric charge of one coulomb.
1V = 1J/C
One volt is equal to current of 1 amp times resistance of 1 ohm:
1V = 1A · 1Ω
Alessandro Volta
The Volt unit is named after Alessandro Volta, an Italian physicist who invented an electric battery.
Volt subunits and conversion table
name symbol conversion example microvolt μV 1μV = 10-6V V = 30μV millivolt mV 1mV = 10-3V V = 5mV volt V -
V = 10V kilovolt kV 1kV = 103V V = 2kV megavolt MV 1MV = 106V V = 5MV Volts to watts conversion
The power in watts (W) is equal to the voltage in volts (V) times the current in amps (A):
watts (W) = volts (V) × amps (A)
Volts to joules conversion
The energy in joules (J) is equal to the voltage in volts (V) times the electric charge in coulombs (C):
joules (J) = volts (V) × coulombs (C)
Volts to amps conversion
The current in amps (A) is equal to the voltage in volts (V) divided by the resistance in ohms (Ω):
amps (A) = volts (V) / ohms(Ω)
The current in amps (A) is equal to the power in watts (W) divided by the voltage in volts (V):
amps (A) = watts (W) / volts (V)
Volts to electron-volts conversion
The energy in electronvolts (eV) is equal to the potential difference or voltage in volts (V) times the electric charge in electron charges (e):
electronvolts (eV) = volts (V) × electron-charge (e)
= volts (V) × 1.602176e-19 coulombs (C)
See also
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