Convert megajoules to watt-hours
1 MJ = 277.777777778 Wh — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
277.777 777 778Wh
As a fraction: 2500/9
1 MJ = 277.777777778 Wh
How to convert megajoules to watt-hours
Multiply the number of megajoules by 277.777777778 to get watt-hours.
Megajoule to Watt-hour conversion table
| Megajoules (MJ) | Watt-hours (Wh) |
|---|---|
| 1 MJ | 277.777 78 |
| 2 MJ | 555.555 56 |
| 3 MJ | 833.333 33 |
| 5 MJ | 1388.8889 |
| 10 MJ | 2777.7778 |
| 20 MJ | 5555.5556 |
| 25 MJ | 6944.4444 |
| 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 |
Watt-hour to Megajoule conversion table
| Watt-hours (Wh) | Megajoules (MJ) |
|---|---|
| 1 Wh | 0.0036 |
| 2 Wh | 0.0072 |
| 3 Wh | 0.0108 |
| 5 Wh | 0.018 |
| 10 Wh | 0.036 |
| 20 Wh | 0.072 |
| 25 Wh | 0.09 |
| 50 Wh | 0.18 |
| 100 Wh | 0.36 |
| 250 Wh | 0.9 |
| 500 Wh | 1.8 |
| 1000 Wh | 3.6 |
Frequently asked
How many watt-hours are in a megajoule?
One megajoule equals 277.7777778 watt-hours (MJ → Wh). That figure is exact, not rounded.
How do you convert megajoules to watt-hours?
Multiply the number of megajoules by 277.777777778 to get watt-hours.
What is 1 Wh in megajoules?
One watt-hour is 0.0036 megajoules.
What is 10 MJ in Wh?
10 MJ = 2777.7778 Wh.