Kilowatt Hour to Kilojoule Converter (kWh to kJ)
1 kilowatt hour = 3,600 kilojoule. One kilowatt-hour is exactly 3,600 kilojoules (3.6 MJ).
Result
30 kWh = 108,000 kJ
How to convert kilowatt hour to kilojoule
One kilowatt-hour is exactly 3,600 kilojoules (3.6 MJ). Electricity bills charge in kWh, while the energy content of fuels and appliances may be given in kJ or MJ.
Formula
kJ = kWh × 3,600
Worked example
30 kWh × 3,600 = 108,000 kJ
Kilowatt Hour to Kilojoule quick-reference table
| Kilowatt Hour (kWh) | Kilojoule (kJ) |
|---|---|
| 0.1 kWh | 360 kJ |
| 1 kWh | 3,600 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 30 kWh | 108,000 kJ |
| 100 kWh | 360,000 kJ |
Real-life examples
An average home using 30 kWh a day uses 108,000 kJ. A 100 W bulb on for 10 hours uses 1 kWh, which is 3,600 kJ.
Frequently asked questions
How many kJ is a kWh?
One kWh is exactly 3,600 kJ, since 1 kW x 3,600 s = 3,600 kJ.
How many kWh is 1 MJ?
One MJ is 0.2778 kWh.
What is 1 kilowatt hour in kilojoule?
1 kilowatt hour = 3,600 kilojoule (kWh to kJ).
What is the formula to convert kWh to kJ?
kJ = kWh × 3,600. For example, 30 kWh × 3,600 = 108,000 kJ.
How do I convert kJ back to kWh?
Use the reverse converter: 1 kilojoule = 0.000277778 kilowatt hour. Check: 108,000 kJ converts back to 30 kWh.
Reverse conversion
Need the other direction? Kilojoule to Kilowatt Hour converter (kJ to kWh): 1 kilojoule = 0.000277778 kilowatt hour.
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