Megajoules to Kilowatt-hours formula
kilowatt-hours = megajoules × 0.277778
Multiply the number of megajoules by 0.277778 to get kilowatt-hours. To go the other way, multiply by 3.6 instead, or use the kwh to mj converter.
Megajoules to Kilowatt-hours conversion table
Common mj to kwh values, rounded for reading. The converter above keeps full precision.
| Megajoules | Kilowatt-hours |
|---|---|
| 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 |
| 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 |
| 250 MJ | 69.4444 kWh |
| 500 MJ | 138.889 kWh |
| 1,000 MJ | 277.778 kWh |
Worked example
To convert 10 MJ to kilowatt-hours, multiply by 0.277778: the result is 2.77778 kWh. A nutritional Calorie is a kilocalorie, equal to 4,184 joules. The smaller scientific calorie equals 4.184 joules.
Frequently asked questions
How many kilowatt-hours are in a megajoule?
One megajoule equals 0.277778 kilowatt-hours (1 MJ = 0.277778 kWh).
What is 10 megajoules in kilowatt-hours?
10 MJ converts to 2.77778 kWh. Enter any other value in the converter above to see it recalculated instantly.
How do I convert kilowatt-hours back to megajoules?
Reverse the calculation: one kilowatt-hour equals 3.6 megajoules. You can also swap the units in the converter or open the kwh to mj page.
Related energy conversions
Need a different pair? Open the full energy converter to choose any two units.