Watt

usgb/wɑːt/
noun

A unit of power in physics, equivalent to one joule per second, named after James Watt.

This light bulb uses 100 watts.
Visual representation of "watt" - A unit of power in physics, equivalent to one joule per second, named after James Watt.

Often appears as...

  • watt-hour
  • kilowatt

Usage tips

Technical

Definition 1 of 1
Visual representation of "watt"
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Power Measurement

The 'watt' measures how much energy a device uses or produces each second.

Illustration for Power Measurement
My electric kettle has a power rating of 1500 watts.
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Small to Large

'Watt' is a base unit, but remember that kilowatts and megawatts symbolize larger quantities of power.

Illustration for Small to Large
The power plant has a capacity of 500 megawatts.
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Context Specification

Use 'watt' in technical or scientific contexts when quantifying power or electricity consumption.

Illustration for Context Specification
How many watts does this appliance draw?
Visual representation of the word "Watt"

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