Convert kilowatt-hours to megajoules
1 kWh = 3.6 MJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
3.6MJ
As a fraction: 18/5
1 kWh = 3.6 MJ
How to convert kilowatt-hours to megajoules
Multiply the number of kilowatt-hours by 3.6 to get megajoules.
The exact factor is 3.6 — as a fraction, 18/5.
Kilowatt-hour: How electricity is billed everywhere.
Kilowatt-hour to Megajoule conversion table
| Kilowatt-hours (kWh) | Megajoules (MJ) |
|---|---|
| 1 kWh | 3.6 |
| 2 kWh | 7.2 |
| 3 kWh | 10.8 |
| 5 kWh | 18 |
| 10 kWh | 36 |
| 20 kWh | 72 |
| 25 kWh | 90 |
| 50 kWh | 180 |
| 100 kWh | 360 |
| 250 kWh | 900 |
| 500 kWh | 1800 |
| 1000 kWh | 3600 |
Megajoule to Kilowatt-hour conversion table
| Megajoules (MJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 MJ | 0.277 777 78 |
| 2 MJ | 0.555 555 56 |
| 3 MJ | 0.833 333 33 |
| 5 MJ | 1.388 888 9 |
| 10 MJ | 2.777 777 8 |
| 20 MJ | 5.555 555 6 |
| 25 MJ | 6.944 444 4 |
| 50 MJ | 13.888 889 |
| 100 MJ | 27.777 778 |
| 250 MJ | 69.444 444 |
| 500 MJ | 138.888 89 |
| 1000 MJ | 277.777 78 |
Frequently asked
How many megajoules are in a kilowatt-hour?
One kilowatt-hour equals 3.6 megajoules (kWh → MJ). That figure is exact, not rounded.
How do you convert kilowatt-hours to megajoules?
Multiply the number of kilowatt-hours by 3.6 to get megajoules.
What is 1 MJ in kilowatt-hours?
One megajoule is 0.2777777778 kilowatt-hours.
What is 10 kWh in MJ?
10 kWh = 36 MJ.
What exactly is a kilowatt-hour?
How electricity is billed everywhere.