Convert kilowatt-hours to megajoules
Enter a value in kilowatt-hours (kWh) to get megajoules (MJ). One kilowatt-hour is 3.6 megajoules; one megajoule is 0.277778 kilowatt-hours.
How to use the Kilowatt-hour to megajoule
- Type the number of kilowatt-hours.
- Click Convert.
- Read the result in megajoules, plus the same value in every other energy unit.
kWh to MJ formula
megajoules = kilowatt-hours × 3.6. To go the other way, kilowatt-hours = megajoules × 0.277778 (see megajoules to kilowatt-hours).
Worked example
12 kWh × 3.6 = 43.2 MJ.
Kilowatt-hours to megajoules conversion table
| Kilowatt-hours | Megajoules |
|---|---|
| 0.1 kWh | 0.36 MJ |
| 0.5 kWh | 1.8 MJ |
| 1 kWh | 3.6 MJ |
| 2 kWh | 7.2 MJ |
| 3 kWh | 10.8 MJ |
| 5 kWh | 18 MJ |
| 10 kWh | 36 MJ |
| 20 kWh | 72 MJ |
| 25 kWh | 90 MJ |
| 50 kWh | 180 MJ |
| 100 kWh | 360 MJ |
| 250 kWh | 900 MJ |
| 500 kWh | 1,800 MJ |
| 1,000 kWh | 3,600 MJ |
About the kilowatt-hour
The electricity billing unit: 1,000 W for one hour. Also EV battery capacity.
About the megajoule
Gas bills in some countries and fuel energy content.
Related conversions
megajoules to kilowatt-hours · kilowatt-hours to kilojoules · kilowatt-hours to British thermal units · any unit.
Frequently asked questions
How many megajoules in a kilowatt-hour?
3.6 megajoules.
How many kilowatt-hours in a megajoule?
0.277778 kilowatt-hours.
Is the factor exact?
The factor 3.6 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.