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Power Calculator
Find power from work done and the time taken.
The rate of work
Power measures how quickly work is done or energy transferred: the same job done faster demands more power. It is work divided by the time taken.
Doing 3000 joules of work in 6 seconds is 500 watts, about two-thirds of a horsepower. Power is what rates engines, appliances, and athletes.
Useful and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is power?
The rate of doing work — work divided by time. It measures how fast energy is used or transferred.
What units?
Joules and seconds give power in watts. The tool also shows horsepower.
How is horsepower related?
One mechanical horsepower is about 745.7 watts.
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