About the kWh to kW Calculator
This calculator converts kWh to kW. kWh is one kilowatt of power used for one hour, the unit your electricity meter counts and your bill charges for, and kW is a thousand watts, the usual way to rate motors, heaters, air conditioners and generators. It divides the energy by the time you give it and shows the average power in kilowatts and in watts. Enter your figures and the answer appears at once, together with a few related values, and you can copy the result with one tap. The sums are done in your browser and nothing is sent anywhere.
Updated October 2026
How to use the kWh to kW Calculator
- 1Enter the value in kWh.
- 2Fill in the other boxes that the kWh to kW calculation needs, such as time, voltage or power factor.
- 3Read the answer in the large result box.
- 4Check the extra rows for related values.
- 5Press Copy result to keep it.
When you need kWh to kW
A bill or a smart meter tells you how many kilowatt-hours were used, but you may want to know how powerful the load was. Dividing by the time gives the average power in kilowatts. It is how you find out whether a month of usage points to a device that is always on, or to a brief heavy load.
Engineers use the same figure to choose a generator or inverter: if a building uses 240 kWh in a day, its average load is 10 kW, and the supply must also cover the peaks above that. Energy managers compare the average power of different periods to spot waste.
How the kWh to kW sum works
kW = kWh ÷ hours. If a heater used 20 kWh over 8 hours, its average power was 20 ÷ 8 = 2.5 kW.
The displayed answer is rounded to six significant figures, but the sum itself is not rounded, so converting kWh to kW and back again gives you the number you started with.
- Enter the time in the unit you measured
- The average hides short peaks
- Add a margin when sizing a supply
Mistakes to avoid when converting kWh to kW
A kWh figure alone has no power in it; you must know the time. A second mistake is to divide by days when the energy was measured over a few hours. The average also hides peaks, so a device may need a supply larger than its average power.
On phone and computer
On a phone, type in the boxes one after another and read the kW result underneath; the Copy button puts it on the clipboard for a message or a note. On a computer the inputs sit on the left and the answer on the right, so you can change one figure and watch the kW value move. The kWh to kW page works the same on both. For the matching step in the other direction, use kW to kWh Calculator. kWh to Watts Calculator gives the figure in watts, Electricity Cost Calculator shows what the energy costs, and Power Converter switches between power units.
Features
- kWh to kW in one step
- Related values shown with the answer
- Clear messages for impossible inputs
- Copy the result with one tap
- Private: nothing is uploaded
- Works on phone and computer
Frequently asked questions
How do I convert kWh to kW?
kW = kWh ÷ hours. If a heater used 20 kWh over 8 hours, its average power was 20 ÷ 8 = 2.5 kW.
What is the formula for kWh to kW?
kW = kWh ÷ hours. The calculator applies it exactly and rounds only the displayed answer.
What is the difference between kWh and kW?
kWh is one kilowatt of power used for one hour, the unit your electricity meter counts and your bill charges for. kW is a thousand watts, the usual way to rate motors, heaters, air conditioners and generators. They measure different things, which is why converting from kWh to kW needs more than a simple multiplication in some cases.
Is average power the same as peak power?
No. The calculator gives the average over the time you enter. A load that switches on and off may reach much higher power for short periods.
How do I convert 100 kWh used in a day to kW?
Choose days as the unit and enter 1: 100 ÷ 24 = 4.1667 kW average. Or enter 24 hours and get the same answer.
Is this kWh to kW calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so the figures you type are not uploaded or stored. It is meant for planning and learning; for wiring or safety work, check the result against your equipment's rating plate and local rules.