Watt-hours to Kilojoules
Convert watt-hours (Wh) to kilojoules (kJ). Type in either box; the other updates as you go.
How to convert watt-hours to kilojoules
To convert watt-hours to kilojoules, multiply the number of watt-hours by 3.6.
Example
Convert 5 watt-hours to kilojoules:
Watt-hour to kilojoule conversion chart
| Watt-hours (Wh) | Kilojoules (kJ) |
|---|---|
| 1 Wh | 3.6 kJ |
| 2 Wh | 7.2 kJ |
| 3 Wh | 10.8 kJ |
| 4 Wh | 14.4 kJ |
| 5 Wh | 18 kJ |
| 6 Wh | 21.6 kJ |
| 7 Wh | 25.2 kJ |
| 8 Wh | 28.8 kJ |
| 9 Wh | 32.4 kJ |
| 10 Wh | 36 kJ |
| 12 Wh | 43.2 kJ |
| 15 Wh | 54 kJ |
| 20 Wh | 72 kJ |
| 25 Wh | 90 kJ |
| 30 Wh | 108 kJ |
| 40 Wh | 144 kJ |
| 50 Wh | 180 kJ |
| 60 Wh | 216 kJ |
| 70 Wh | 252 kJ |
| 75 Wh | 270 kJ |
| 80 Wh | 288 kJ |
| 90 Wh | 324 kJ |
| 100 Wh | 360 kJ |
| 150 Wh | 540 kJ |
| 200 Wh | 720 kJ |
| 250 Wh | 900 kJ |
| 500 Wh | 1,800 kJ |
| 1,000 Wh | 3,600 kJ |
Going the other way? See the kilojoules to watt-hours chart.
About the units
Watt-hour (Wh)
A watt-hour is the energy of one watt for one hour, 3,600 joules. Batteries are rated in watt-hours.
Kilojoule (kJ)
A kilojoule is 1,000 joules. Food labels in Australia and Europe give energy in kJ next to kcal.
Frequently asked questions
How many kilojoules are in a watt-hour?
There are 3.6 kilojoules in a watt-hour.
How many watt-hours are in a kilojoule?
There are 0.2777777778 watt-hours in a kilojoule.
How do you convert watt-hours to kilojoules?
To convert watt-hours to kilojoules, multiply the number of watt-hours by 3.6.
What is 5 watt-hours in kilojoules?
5 watt-hours equals 18 kilojoules.
Convert between joules, calories, kilocalories, kilowatt-hours and BTU. Open the energy converter to see a value in every unit at once.