Watt-hours to Megajoules
Convert watt-hours (Wh) to megajoules (MJ). Type in either box; the other updates as you go.
How to convert watt-hours to megajoules
To convert watt-hours to megajoules, multiply the number of watt-hours by 0.0036.
Example
Convert 5 watt-hours to megajoules:
Watt-hour to megajoule conversion chart
| Watt-hours (Wh) | Megajoules (MJ) |
|---|---|
| 1 Wh | 0.0036 MJ |
| 2 Wh | 0.0072 MJ |
| 3 Wh | 0.0108 MJ |
| 4 Wh | 0.0144 MJ |
| 5 Wh | 0.018 MJ |
| 6 Wh | 0.0216 MJ |
| 7 Wh | 0.0252 MJ |
| 8 Wh | 0.0288 MJ |
| 9 Wh | 0.0324 MJ |
| 10 Wh | 0.036 MJ |
| 12 Wh | 0.0432 MJ |
| 15 Wh | 0.054 MJ |
| 20 Wh | 0.072 MJ |
| 25 Wh | 0.09 MJ |
| 30 Wh | 0.108 MJ |
| 40 Wh | 0.144 MJ |
| 50 Wh | 0.18 MJ |
| 60 Wh | 0.216 MJ |
| 70 Wh | 0.252 MJ |
| 75 Wh | 0.27 MJ |
| 80 Wh | 0.288 MJ |
| 90 Wh | 0.324 MJ |
| 100 Wh | 0.36 MJ |
| 150 Wh | 0.54 MJ |
| 200 Wh | 0.72 MJ |
| 250 Wh | 0.9 MJ |
| 500 Wh | 1.8 MJ |
| 1,000 Wh | 3.6 MJ |
Going the other way? See the megajoules to watt-hours chart.
About the units
Watt-hour (Wh)
A watt-hour is the energy of one watt for one hour, 3,600 joules. Batteries are rated in watt-hours.
Megajoule (MJ)
A megajoule is 1,000,000 joules, about the kinetic energy of a one-tonne car at 160 km/h.
Frequently asked questions
How many megajoules are in a watt-hour?
There are 0.0036 megajoules in a watt-hour.
How many watt-hours are in a megajoule?
There are 277.7777778 watt-hours in a megajoule.
How do you convert watt-hours to megajoules?
To convert watt-hours to megajoules, multiply the number of watt-hours by 0.0036.
What is 5 watt-hours in megajoules?
5 watt-hours equals 0.018 megajoules.
Convert between joules, calories, kilocalories, kilowatt-hours and BTU. Open the energy converter to see a value in every unit at once.