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Energy
Megajoules to Watt-hours
Convert megajoules (MJ) to watt-hours (Wh). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 MJ = 277.78 Wh
Megajoules to Watt-hours Conversion Table
Common values, ready to copy:
| megajoules | watt-hours |
|---|---|
| 1 MJ | 277.78 Wh |
| 2 MJ | 555.56 Wh |
| 5 MJ | 1388.89 Wh |
| 10 MJ | 2777.78 Wh |
| 25 MJ | 6944.44 Wh |
| 50 MJ | 13888.89 Wh |
| 100 MJ | 27777.78 Wh |
| 1,000 MJ | 277777.78 Wh |
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Formula
watt-hours = megajoules × 2.77777778e+2
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
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