Kilowatt Hours to Watts Calculator

Summary

Enter energy in kilowatt-hours and time in hours to calculate the equivalent average power in watts.

How it works

1. Enter the total energy consumed or delivered in kilowatt-hours (kWh).
2. Enter the duration in hours (h) over which the energy was used.
3. Press Calculate to see the equivalent average power in watts (W).
4. The breakdown panel shows watt-hours and the applied formula.
5. Press Reset to clear all fields and start a new calculation.

Use cases

• Find the average power draw of an appliance from its monthly kWh usage on an electricity bill.
• Convert battery capacity (kWh) to average watt output for a given discharge time.
• Determine average solar panel output in watts from a daily or monthly kWh generation report.
• Size inverters and charge controllers by converting stored kWh to required watt capacity.
• Cross-check smart meter kWh readings against expected wattage for a known run time.
• Estimate average power consumption of an EV from a charging session energy and duration.
• Calculate average wattage of industrial equipment from logged energy and operating hours.
• Convert utility or generator kWh output logs into average power ratings for load analysis.

Frequently Asked Questions