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Convert kilowatt hour to megajoule

Here you can quickly calculate how many megajoule fit in one kilowatt hour.
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  • 1 kWh = 3.6 MJ
  • 1 MJ = 0.277778 kWh

Example: kilowatt hour to megajoule

  • 1 kilowatt hour = 3.6 megajoule

Kilowatt hour to megajoule conversion table

kilowatt hour megajoule
1 3.6
2 7.2
5 18
10 36
20 72
50 180
100 360

Kilowatt hour to megajoule formula

To convert kilowatt hour to megajoule, multiply by 3.6.

1 kWh = 3.6 MJ
Example: 1 kilowatt hour = 3.6 megajoule

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 megajoule conversion quiz

Score: 0

20.2 kilowatt hour equals 83.6 megajoule.

Correct answer: 20.2 kilowatt hour = 72.7 megajoule.

0.6 kilowatt hour equals 2.16 megajoule.

Correct answer: 0.6 kilowatt hour = 2.16 megajoule.

116 kilowatt hour equals 355 megajoule.

Correct answer: 116 kilowatt hour = 418 megajoule.

95 kilowatt hour equals 342 megajoule.

Correct answer: 95 kilowatt hour = 342 megajoule.

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