Convert kilowatt-hours to kilojoules
Kilowatt-hour (kWh) to kilojoule (kJ). One kilowatt-hour equals 3600 kilojoules.
Formula
Kilowatt-hour to kilojoule conversion table
| Kilowatt-hours | Kilojoules | Kilojoules | Kilowatt-hours |
|---|---|---|---|
| 1 kWh | 3600 kJ | 1 kJ | 0.000278 kWh |
| 2 kWh | 7200 kJ | 2 kJ | 0.000556 kWh |
| 3 kWh | 10800 kJ | 3 kJ | 0.000833 kWh |
| 5 kWh | 18000 kJ | 5 kJ | 0.001389 kWh |
| 10 kWh | 36000 kJ | 10 kJ | 0.002778 kWh |
| 20 kWh | 72000 kJ | 20 kJ | 0.005556 kWh |
| 50 kWh | 180000 kJ | 50 kJ | 0.013889 kWh |
| 100 kWh | 360000 kJ | 100 kJ | 0.027778 kWh |
| 500 kWh | 1800000 kJ | 500 kJ | 0.138889 kWh |
| 1000 kWh | 3600000 kJ | 1000 kJ | 0.277778 kWh |
To convert kilowatt-hours to kilojoules, multiply the number of kilowatt-hours by 3600. One kilowatt-hour equals 3600 kilojoules, and one kilojoule equals 0.000278 kilowatt-hours, so the relationship is fixed and exact. As a worked example, 10 kWh comes to 36000 kJ. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a energy conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common kilowatt-hour values already worked out in kilojoules, plus the reverse kilojoule to kilowatt-hour direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many kilojoules are in a kilowatt-hour?
One kilowatt-hour equals 3600 kilojoules. The ratio is constant, so you can multiply any number of kilowatt-hours by 3600 to get kilojoules.
What is the formula to convert kilowatt-hours to kilojoules?
Use kilojoules = kilowatt-hours × 3600. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert kilojoules back to kilowatt-hours?
Go the other way by using one kilojoule equals 0.000278 kilowatt-hours. You can also press the swap button in the converter above to flip the direction in one click.
Is this kilowatt-hour to kilojoule converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.