Enter the power in watts (W), time period in hours (h), then press the **Calculate** button to get the result in kilowatt-hours (kWh).

## Watts to kWh calculation

E_{(kWh)} = P_{(W)} × t_{(h)} / 1000

The energy **E** in kilowatt-hours (kWh) is equal to the power **P** in watts (W), multiplied by the time period **t** in hours (h), divided by 1000.

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