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Power Calculator - Work Over Time
Free power calculator. Calculate power from work and time. Convert between watts, kilowatts, and horsepower.
Power Calculator
Calculate power from work and time
Power Output
Enter your values to see results
and click the "Calculate" button
Power Calculator
Calculate power as the rate of doing work or transferring energy. Power measures how quickly energy is used or produced.
Power Formula
P = W / t
Where P is power in Watts, W is work in Joules, and t is time in seconds. 1 Watt = 1 Joule per second.
Frequently Asked Questions
What is the difference between power and energy?
Energy is the capacity to do work (measured in Joules). Power is the rate of energy transfer (Joules per second = Watts).
How do watts and horsepower compare?
1 horsepower = 745.7 watts. A 100W light bulb uses about 0.134 hp.
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