How to convert Watts to Wh

Watts to Wh calculation formula

E(Wh) = P(W) × t(h)

The energy E in watt-hours (Wh) is equal to the power P in watts (W), multiplied by the time period t in hours (h).


Wh = W × h
watt-hour = watt × hour

For example:

Power (P) = 250W
Time period (t) = 5h

Energy (E) = 250W x 5h = 1250Wh