Kilowatt-hours to Megajoules formula
megajoules = kilowatt-hours × 3.6
Multiply the number of kilowatt-hours by 3.6 to get megajoules. To go the other way, multiply by 0.277778 instead, or use the mj to kwh converter.
Kilowatt-hours to Megajoules conversion table
Common kwh to mj values, rounded for reading. The converter above keeps full precision.
| Kilowatt-hours | Megajoules |
|---|---|
| 1 kWh | 3.6 MJ |
| 2 kWh | 7.2 MJ |
| 3 kWh | 10.8 MJ |
| 4 kWh | 14.4 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 |
| 250 kWh | 900 MJ |
| 500 kWh | 1,800 MJ |
| 1,000 kWh | 3,600 MJ |
Worked example
To convert 10 kWh to megajoules, multiply by 3.6: the result is 36 MJ. A nutritional Calorie is a kilocalorie, equal to 4,184 joules. The smaller scientific calorie equals 4.184 joules.
Frequently asked questions
How many megajoules are in a kilowatt-hour?
One kilowatt-hour equals 3.6 megajoules (1 kWh = 3.6 MJ).
What is 10 kilowatt-hours in megajoules?
10 kWh converts to 36 MJ. Enter any other value in the converter above to see it recalculated instantly.
How do I convert megajoules back to kilowatt-hours?
Reverse the calculation: one megajoule equals 0.277778 kilowatt-hours. You can also swap the units in the converter or open the mj to kwh page.
Related energy conversions
Need a different pair? Open the full energy converter to choose any two units.