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Home / Physics / Difference Between Watts and Volts

Learn The Difference Between Watts and Volts

Last Updated on Feb 19, 2025
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In electricity, we come through many aspects on which electric current is dependent. Two characteristics on which an electric current is dependent are watts and volts. Both these are the S.I. units of electric power and electric voltage respectively. Both these units are essential for the electric field and electrical engineering. Both these units are very different from each other and can never be used interchangeably. They are quite important to understand everything related to electricity as they are used in almost everything. In this Physics article, we will be learning the differences between watts and volts.

What is a Watt?

A watt can be defined as the S.I. unit of electric power which is the rate of performing work when one ampere of current is flowing across the one volt of the potential difference.

Also read about power factor here.

What is a Volt?

A volt can be defined as the S.I. unit of the potential difference which flows through two terminals of a wire which is capable of conducting electric current. It is measured by a voltmeter. It has subunits like microvolt, millivolt, kilovolt, etc.

Difference between Watt and Volt

The difference between watt and volt is mentioned as follows below:

Watt  Volt 
It is the S.I. unit of electric power. It is the S.I. unit of electric potential difference.
It is denoted by the symbol ‘W’. It is denoted by the symbol ‘V’.
Its formula is current times voltage. Its formula is current times resistance.
It is associated with power. It is associated with potential differences.
It is measured by a power meter. It is measured by a voltmeter.
Its base unit is . Its base unit is .
Its dimensional formula is . Its dimensional formula is .
It denotes the work done by a body. It denotes the potential difference present on the terminal of the wire.
It gives more realistic value. It does not give that much real value.
It provides the whole value of the electric power. It gives the value of a portion of a potential difference.

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Difference Between Watts and Volts FAQs

The difference between a volt and a watt is that the volt is the S.I. unit of potential difference whereas watt is the S.I. unit of electric power.

1 volt is equal to 1 watt if the ampere value is 1A.

A volt is bigger than a watt.

20 watts is equal to 20 volts considering 1 ampere.

No, 5 watts is not the same as 5 volts.
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