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
Conversion from kilowatt hour to megajoule example
- 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 |
Formula to convert kilowatt hour to megajoule
To convert kilowatt hour to megajoule, multiply by 3.6.
1 kWh = 3.6 MJ
Example: 1 kilowatt hour = 3.6 megajoule
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 megajoule conversion quiz
Score:
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15.4 megajoule equals 4.28 kilowatt hour.
Correct answer: 15.4 megajoule = 4.28 kilowatt hour.
127 megajoule equals 35.3 kilowatt hour.
Correct answer: 127 megajoule = 35.3 kilowatt hour.
4.3 kilowatt hour equals 17.8 megajoule.
Correct answer: 4.3 kilowatt hour = 15.5 megajoule.
16.7 kilowatt hour equals 66.1 megajoule.
Correct answer: 16.7 kilowatt hour = 60.1 megajoule.
122 megajoule equals 28.8 kilowatt hour.
Correct answer: 122 megajoule = 33.9 kilowatt hour.