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Convert kilowatt hour to kilojoule

Here you can quickly calculate how many kilojoule fit in one kilowatt hour.
write a number and we convert instantly
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  • 1 kWh = 3600 kJ
  • 1 kJ = 0.000278 kWh

Example: kilowatt hour to kilojoule

  • 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

Kilowatt hour to kilojoule formula

To convert kilowatt hour to kilojoule, multiply by 3600.

1 kWh = 3600 kJ
Example: 1 kilowatt hour = 3600 kilojoule

Common energy conversion mistakes

  • 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.
  • 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 and kilojoule conversion quiz

Score: 0

2 kilojoule equals 0.00278 kilowatt hour.

Correct answer: 2 kilojoule = 0.000556 kilowatt hour.

50 kilowatt hour equals 900 000 kilojoule.

Correct answer: 50 kilowatt hour = 180 000 kilojoule.

100 kilowatt hour equals 360 000 kilojoule.

Correct answer: 100 kilowatt hour = 360 000 kilojoule.

50 kilowatt hour equals 18 000 kilojoule.

Correct answer: 50 kilowatt hour = 180 000 kilojoule.

25 kilojoule equals 0.00139 kilowatt hour.

Correct answer: 25 kilojoule = 0.00694 kilowatt hour.

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