Convert watt-hours to megajoules
1 Wh = 0.0036 MJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.0036MJ
As a fraction: 9/2500
1 Wh = 0.0036 MJ
How to convert watt-hours to megajoules
Multiply the number of watt-hours by 0.0036 to get megajoules.
The exact factor is 0.0036 — as a fraction, 9/2500.
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 |
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 |
Frequently asked
How many megajoules are in a watt-hour?
One watt-hour equals 0.0036 megajoules (Wh → MJ). That figure is exact, not rounded.
How do you convert watt-hours to megajoules?
Multiply the number of watt-hours by 0.0036 to get megajoules.
What is 1 MJ in watt-hours?
One megajoule is 277.7777778 watt-hours.
What is 10 Wh in MJ?
10 Wh = 0.036 MJ.