Megajoules to kilowatt-hours
Type a value in MJ to get it in kWh instantly.
That's 12× as much energy as a day of eating, while charging an electric car is 2.2× more. That could lift a one-tonne car 10,200 m into the air.
Convert the other way: kWh to MJ
What it means
What could that energy do?
The hill climb ignores friction and assumes a 1,000 kg car. Food calories on labels are kilocalories.
The math
How to convert MJ to kWh
To convert megajoules to kilowatt-hours, multiply by 0.277778.
Example: 100 MJ × 0.277778 = 27.7778 kWh.
In the other direction, 1 kWh = 3.6 MJ.
Every unit
Your energy in every unit
Tables
MJ to kWh conversion table
| MJ | kWh |
|---|---|
| 1 MJ | 0.277778 kWh |
| 2 MJ | 0.555556 kWh |
| 5 MJ | 1.38889 kWh |
| 10 MJ | 2.77778 kWh |
| 15 MJ | 4.16667 kWh |
| 20 MJ | 5.55556 kWh |
| 25 MJ | 6.94444 kWh |
| 50 MJ | 13.8889 kWh |
| 75 MJ | 20.8333 kWh |
| 100 MJ | 27.7778 kWh |
| 150 MJ | 41.6667 kWh |
| 200 MJ | 55.5556 kWh |
| 500 MJ | 138.889 kWh |
| 1,000 MJ | 277.778 kWh |
kWh to MJ conversion table
| kWh | MJ |
|---|---|
| 1 kWh | 3.6 MJ |
| 2 kWh | 7.2 MJ |
| 5 kWh | 18 MJ |
| 10 kWh | 36 MJ |
| 15 kWh | 54 MJ |
| 20 kWh | 72 MJ |
| 25 kWh | 90 MJ |
| 50 kWh | 180 MJ |
| 75 kWh | 270 MJ |
| 100 kWh | 360 MJ |
| 150 kWh | 540 MJ |
| 200 kWh | 720 MJ |
| 500 kWh | 1,800 MJ |
| 1,000 kWh | 3,600 MJ |
Quick answers
Quick answers
- How many kWh is 1 MJ?
- 1 MJ is 0.277778 kWh.
- How many kWh is 10 MJ?
- 10 MJ is 2.77778 kWh.
- How many kWh is 100 MJ?
- 100 MJ is 27.7778 kWh.
The units
About these units
Megajoules (MJ)
A megajoule is a million joules, about the energy in a quarter of a chocolate bar or a fifth of a kilowatt-hour.
Kilowatt-hours (kWh)
A kilowatt-hour is 3.6 million joules and the unit on your electricity bill. An electric car battery holds roughly 60 of them.
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