J to Kilowatt-hours converter (J to kWh)
Convert J (J) to Kilowatt-hours (kWh) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert J to Kilowatt-hours
1 joule (J) is equal to 2.7778 × 10⁻⁷ kilowatt-hours (kWh).
E(kWh) = E(J) ÷ 3,600,000
Divide the energy in joules by 3,600,000:
Example: Convert 3,600,000 J to kWh:
E(kWh) = 3,600,000 ÷ 3,600,000 = 1 kWh
What is a J?
The J (J) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Kilowatt-hours?
The Kilowatt-hours (kWh) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts energy from J into Kilowatt-hours. One J equals 2.777780e-7 kWh.
J to Kilowatt-hours conversion table
Common J values and the matching kWh result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| J (J) | Kilowatt-hours (kWh) |
|---|---|
| 0 J | 0 kWh |
| 1000 J | 0.000277778 kWh |
| 10000 J | 0.00277778 kWh |
| 100000 J | 0.0277778 kWh |
| 1000000 J | 0.277778 kWh |
| 3600000 J | 1.0000008 kWh |
How this calculator works
The form on this page is a J-to-Kilowatt-hours converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the kWh result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many kWh are in 1 J?
1 J = 2.777780e-7 kWh.
How do I convert J to Kilowatt-hours?
Divide the energy in joules by 3,600,000:
Is this J to kWh converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.