Convert Megajoule to Kilowatt-hour
1 megajoule = 0.2777778 kilowatt-hour (kWh). For example, 10 megajoule = 2.777778 kilowatt-hour and 100 megajoule = 27.77778 kilowatt-hour. Type any value below to convert megajoule to kilowatt-hour both ways — it runs entirely in your browser.
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Megajoule to Kilowatt-hour conversion formula
To convert megajoule to kilowatt-hour, multiply by 0.2777778:
kilowatt-hour = megajoule × 0.2777778
Going the other way, 1 kilowatt-hour = 3.6 megajoule, so
megajoule = kilowatt-hour × 3.6.
Megajoule to Kilowatt-hour — worked examples
| Megajoule | Kilowatt-hour |
|---|---|
| 1 MJ | 0.2777778 kWh |
| 2 MJ | 0.5555556 kWh |
| 3 MJ | 0.8333333 kWh |
| 5 MJ | 1.388889 kWh |
| 10 MJ | 2.777778 kWh |
| 25 MJ | 6.944444 kWh |
| 50 MJ | 13.88889 kWh |
| 100 MJ | 27.77778 kWh |
Megajoule ↔ Kilowatt-hour reference table
| Megajoule → Kilowatt-hour | Kilowatt-hour → Megajoule |
|---|---|
| 1 MJ = 0.2777778 kWh | 1 kWh = 3.6 MJ |
| 2 MJ = 0.5555556 kWh | 2 kWh = 7.2 MJ |
| 5 MJ = 1.388889 kWh | 5 kWh = 18 MJ |
| 10 MJ = 2.777778 kWh | 10 kWh = 36 MJ |
| 20 MJ = 5.555556 kWh | 20 kWh = 72 MJ |
| 50 MJ = 13.88889 kWh | 50 kWh = 180 MJ |
| 100 MJ = 27.77778 kWh | 100 kWh = 360 MJ |
| 250 MJ = 69.44444 kWh | 250 kWh = 900 MJ |
| 500 MJ = 138.8889 kWh | 500 kWh = 1,800 MJ |
| 1000 MJ = 277.7778 kWh | 1000 kWh = 3,600 MJ |
About megajoule and kilowatt-hour
Megajoule: A megajoule is 1,000,000 joules (1,000 kJ) — used for larger energy quantities such as the energy content of fuels.
Kilowatt-hour: A kilowatt-hour is 1,000 watt-hours — exactly 3,600,000 joules (3.6 MJ). It is the "unit" your electricity meter bills.
Frequently asked questions
- How many kilowatt-hour are in 1 megajoule?
- 1 megajoule = 0.2777778 kilowatt-hour (kWh).
- How do I convert megajoule to kilowatt-hour?
- Multiply the number of megajoule by 0.2777778. For example, 10 megajoule = 10 × 0.2777778 = 2.777778 kilowatt-hour.
- How many megajoule are in 1 kilowatt-hour?
- 1 kilowatt-hour = 3.6 megajoule.
- Which is bigger, megajoule or kilowatt-hour?
- 1 kilowatt-hour equals 3.6 megajoule, so a kilowatt-hour is the larger unit.