Megajoules to Watt Hours Converter
EngineeringJoules, calories, kilowatt-hours and more.
How to convert Megajoules to Watt Hours
Multiply the megajoules value by 277.778: 1 MJ = 277.778 Wh. Going the other way, 1 Wh = 0.0036 MJ, so divide by 277.778 or use the Watt Hours to Megajoules converter.
About these units
Megajoules (MJ)
A megajoule is one million joules. A kilowatt-hour is 3.6 MJ, and vehicle fuels contain roughly 30 to 45 MJ per liter or kilogram.
Watt Hours (Wh)
A watt-hour is the energy of one watt sustained for one hour, exactly 3,600 joules. Phone and laptop batteries are rated in watt-hours.
Megajoules to Watt Hours conversion table
| Megajoules (MJ) | Watt Hours (Wh) |
|---|---|
| 1 MJ | 277.778 Wh |
| 2 MJ | 555.556 Wh |
| 3 MJ | 833.333 Wh |
| 4 MJ | 1,111.11 Wh |
| 5 MJ | 1,388.89 Wh |
| 10 MJ | 2,777.78 Wh |
| 20 MJ | 5,555.56 Wh |
| 25 MJ | 6,944.44 Wh |
| 50 MJ | 13,888.9 Wh |
| 100 MJ | 27,777.8 Wh |
| 500 MJ | 138,889 Wh |
| 1,000 MJ | 277,778 Wh |
More megajoules conversions
- Megajoules to Joules1 MJ = 1e+6 J
- Megajoules to Kilojoules1 MJ = 1,000 kJ
- Megajoules to Gigajoules1 MJ = 0.001 GJ
- Megajoules to Millijoules1 MJ = 1e+9 mJ
- Megajoules to Microjoules1 MJ = 1e+12 µJ
- Megajoules to Nanojoules1 MJ = 1e+15 nJ
- Megajoules to Calories1 MJ = 239,006 cal
- Megajoules to British Thermal Units1 MJ = 947.813 BTU
- Megajoules to Ergs1 MJ = 1e+13 erg
See every unit on the Energy Converter.