What is the formula for converting kWh to kW?

The formula is kW = kWh / hours. Energy (kWh) divided by time (h) gives average power (kW). For example, 12 kWh consumed over 4 hours equals 12 / 4 = 3 kW average power.

What is the difference between kWh and kW?

kW (kilowatts) is a measure of power — the rate of energy use at any instant, like speed. kWh (kilowatt-hours) is a measure of energy — the total electricity consumed over time, like distance traveled. kWh = kW × hours, so kW = kWh / hours.

How do I convert minutes or seconds to hours for this calculator?

Divide minutes by 60 to get hours (e.g., 90 minutes = 1.5 h). Divide seconds by 3600 to get hours (e.g., 1800 seconds = 0.5 h). Enter the decimal hours value in the Time field.

My electricity bill shows kWh — how do I find my average power?

Take the total kWh for the billing period and divide by the number of hours in that period. For a 30-day month, that is 720 hours. For example, 360 kWh over 30 days = 360 / 720 = 0.5 kW average load.

Can I convert Wh to watts with this tool?

Yes. Divide your watt-hours by 1000 to get kWh (e.g., 500 Wh = 0.5 kWh), then enter that value in the Energy field. The kW result multiplied by 1000 gives watts.

A battery stored 7.2 kWh and discharged over 3 hours — what is the average power?

kW = 7.2 kWh / 3 h = 2.4 kW average discharge power.

Kilowatt Hours to Kilowatts Calculator

Enter energy in kilowatt-hours (kWh) and duration in hours to instantly calculate average power in kilowatts (kW).

Input Values

Energy (kWh)

Time (hours) e.g. 1.5 for 90 min

Result

Enter values and press Calculate

Formula

Power Formula

kW = kWh ÷ hours

Example

12 kWh ÷ 4 h = 3 kW

Result copied!

Summary

This calculator converts energy measured in kilowatt-hours (kWh) and a time duration in hours into average power measured in kilowatts (kW). The relationship is straightforward: kW = kWh / hours. This is the inverse of multiplying power by time, and it is useful when you know the total energy consumed and want to determine the average power draw over that period — for example when reading an electricity meter or analyzing a battery discharge log.

How it works

Enter the total energy value in kilowatt-hours (kWh).
Enter the duration of the time period in hours (h).
Press Calculate to see the average power in kilowatts (kW).
The breakdown panel shows the applied formula and intermediate values.
Use the Copy Result button to copy the kW value to your clipboard.
Press Reset to clear all fields and start a new calculation.

Use cases

Determine the average power draw of a device from its metered energy consumption.
Analyze battery discharge logs to find average load power over a session.
Estimate appliance wattage from a smart meter reading and usage period.
Cross-check generator fuel consumption by backing out average kW from kWh logged.
Calculate average charging power from an EV session energy and session length.
Verify rated power of industrial equipment against actual energy usage records.
Convert monthly kWh electricity bill data into an average continuous kW load.
Size inverters or solar systems from known daily kWh consumption and daylight hours.

Frequently Asked Questions

Last updated: 2026-05-23 · Reviewed by Nham Vu