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Convert kilojoule to kilowatt hour

Here you can quickly calculate how many kilowatt hour fit in one kilojoule.

- scroll: formula · table · questions -

  • 1 kJ = 0.000278 kWh
  • 1 kWh = 3600 kJ

Kilojoule to kilowatt hour conversion table

kilojoule kilowatt hour
1 0.000278
2 0.000556
5 0.001389
10 0.002778
20 0.005556
50 0.013889
100 0.027778

Formula to convert kilojoule to kilowatt hour

To convert kilojoule to kilowatt hour, divide by 3600.

1 kJ = 0.000278 kWh
Example: 1 kilojoule = 0.000278 kilowatt hour

Common 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 kilojoule to/from kilowatt hour conversion quiz

Score: 0

2 kilojoule equals 0.000556 kilowatt hour.

Correct answer: 2 kilojoule = 0.000556 kilowatt hour.

5 kilojoule equals 0.0139 kilowatt hour.

Correct answer: 5 kilojoule = 0.00139 kilowatt hour.

25 kilowatt hour equals 9.0e+5 kilojoule.

Correct answer: 25 kilowatt hour = 9.0e+4 kilojoule.

50 kilowatt hour equals 1.8e+5 kilojoule.

Correct answer: 50 kilowatt hour = 1.8e+5 kilojoule.

2 kilowatt hour equals 3.6e+4 kilojoule.

Correct answer: 2 kilowatt hour = 7.2e+3 kilojoule.

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