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Calculator for Power and Energy

Calculates power, energy or duration from the other two values. Power is physical energy, which is transferred in a certain amount of time. It is calculated as energy per time. Energy is physical power, which is performed over a certain timespan. It is calculated as power times time.

Energy E:
Time t:d h m s
Power P:

Round to    decimal places.



Please enter two values and select the units, the third value will be calculated. The formula for power is P = E / t, for energy it is E = P * t. The unit of power, watt, is calculated as joules per second, 1 W = 1 J / s. Time is counted as days (d), hours (h), minutes (m) and seconds (s).

Example: if a solar plant produces 3 kilowatt hours of electricity within 90 minutes, it has an average power of 2000 watts.


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