Convert kilowatt hour to kilojoule
Here you can quickly calculate how many kilojoule fit in one kilowatt hour.
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- 1 kWh = 3600 kJ
- 1 kJ = 0.000278 kWh
Conversion from kilowatt hour to kilojoule example
- 1 kilowatt hour = 3600 kilojoule
Kilowatt hour to kilojoule conversion table
| kilowatt hour | kilojoule |
|---|---|
| 1 | 3600 |
| 2 | 7200 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 50 | 180000 |
| 100 | 360000 |
Formula to convert kilowatt hour to kilojoule
To convert kilowatt hour to kilojoule, multiply by 3600.
1 kWh = 3600 kJ
Example: 1 kilowatt hour = 3600 kilojoule
Common mistakes
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Kilowatts (kW) and kilowatt-hours (kWh) are constantly confused: kW is power, how fast energy is being used right now, while kWh is an amount of energy, power times time. A 2 kW heater running for 3 hours uses 2 × 3 = 6 kWh. Your electricity bill counts kWh; your main fuse limits kW.
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The relationship is exact: 1 kWh = 3.6 MJ (3,600 kJ, because an hour has 3,600 seconds). The common slip is dividing when you should multiply: 10 kWh is 36 MJ, not 2.8. Remember the direction: kWh → MJ means times 3.6.
Quick kilowatt hour to/from kilojoule conversion quiz
Score:
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2 kilowatt hour equals 1.44e+3 kilojoule.
Correct answer: 2 kilowatt hour = 7.2e+3 kilojoule.
5 kilojoule equals 0.00139 kilowatt hour.
Correct answer: 5 kilojoule = 0.00139 kilowatt hour.
1 kilowatt hour equals 720 kilojoule.
Correct answer: 1 kilowatt hour = 3.6e+3 kilojoule.
50 kilojoule equals 0.00139 kilowatt hour.
Correct answer: 50 kilojoule = 0.0139 kilowatt hour.