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Power Calculator
All physics tools
Calculate power from work done and the time interval.
Work & Time
Work Done (W) (J)
Time Interval (t) (s)
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Calculation Results
About this calculator
Overview
Power is the rate at which work is done or energy is transferred. It tells you how fast energy is being used.
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Pro Tips
Power = Work / Time.
The SI unit of power is the Watt (W), where 1W = 1 Joule per second.
Horsepower is a common non-SI unit of power (1 hp ≈ 746 W).
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Fun Facts
"James Watt, the Scottish engineer, improved the steam engine and the unit 'Watt' was named in his honor."
"A human in top physical condition can sustain about 300-400 Watts of power on a bicycle for an hour."
"The Sun outputs about 3.8 × 10^26 Watts of power."
Formula: P = W / t
