Watts to kWh Calculator

Power in watts (W) to energy in kilowatt-hours (kWh) calculator and calculation formula.

Enter the power in watts, consumption time period in hours and press the Calculate button:


Enter power in watts:		W
Enter time in hours:		hr

Energy result in kilowatt-hours:		kWh

Watts to kWh calculation

The energy E in kilowatt-hours (kWh) is equal to the power P in watts (W),

times the time period t in hours (hr) divided by 1000:

E_(kWh) = P_(W) × t_(hr) / 1000

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