How to convert Watts to Watt-hours

How to convert electic power in Watts (W) to energy to Watt-hours (Wh).

It is possible to calculate watt-hours from watts and hours, but you cannot convert watts to watt-hours since watts and watt-hour units represent different quantities.

Watts to Watt-hours calculation formula

The energy E in watt-hours (Wh) is equal to the power P in watts (W) times the time period t in hours (h):

E(Wh) = P(W) * t(h)


Watt-hours = Watts * Hours


Wh = W * h


Find the energy consumption in watt hours given a power consumption of 5 watts and a time duration of 3 hours:

E = 5W * 3h = 15 Wh

Wh to Watts ►

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