How to convert megajoules to kilowatt-hours
Formula: kWh = MJ ÷ 3.6
Worked example: 10 MJ → 10 ÷ 3.6 = 2.77778 kWh
Megajoules to kilowatt-hours conversion chart
| Megajoules (MJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 MJ | 0.277778 kWh |
| 2 MJ | 0.555556 kWh |
| 3 MJ | 0.833333 kWh |
| 4 MJ | 1.11111 kWh |
| 5 MJ | 1.38889 kWh |
| 6 MJ | 1.66667 kWh |
| 7 MJ | 1.94444 kWh |
| 8 MJ | 2.22222 kWh |
| 9 MJ | 2.5 kWh |
| 10 MJ | 2.77778 kWh |
| 12 MJ | 3.33333 kWh |
| 15 MJ | 4.16667 kWh |
| 20 MJ | 5.55556 kWh |
| 25 MJ | 6.94444 kWh |
| 30 MJ | 8.33333 kWh |
| 40 MJ | 11.1111 kWh |
| 50 MJ | 13.8889 kWh |
| 75 MJ | 20.8333 kWh |
| 100 MJ | 27.7778 kWh |
| 250 MJ | 69.4444 kWh |
| 500 MJ | 138.889 kWh |
| 1,000 MJ | 277.778 kWh |
What is a megajoule?
The megajoule equals one million joules, exactly the energy of 0.2778 kilowatt-hour. It is used for fuel energy content: a liter of gasoline holds about 32 to 34 MJ.
What is a kilowatt-hour?
The kilowatt-hour equals 1,000 watt-hours, or 3.6 megajoules. It is the unit on every electricity bill and for electric car batteries: a 2,000 W heater running for 3 hours uses 6 kWh.