Convert Kilowatt-hour to Megajoule
1 kilowatt-hour = 3.6 megajoule (MJ). For example, 10 kilowatt-hour = 36 megajoule and 100 kilowatt-hour = 360 megajoule. Type any value below to convert kilowatt-hour to megajoule both ways — it runs entirely in your browser.
Kilowatt-hour to Megajoule conversion formula
To convert kilowatt-hour to megajoule, multiply by 3.6:
megajoule = kilowatt-hour × 3.6
Going the other way, 1 megajoule = 0.2777778 kilowatt-hour, so
kilowatt-hour = megajoule × 0.2777778.
Kilowatt-hour to Megajoule — worked examples
| Kilowatt-hour | Megajoule |
|---|---|
| 1 kWh | 3.6 MJ |
| 2 kWh | 7.2 MJ |
| 3 kWh | 10.8 MJ |
| 5 kWh | 18 MJ |
| 10 kWh | 36 MJ |
| 25 kWh | 90 MJ |
| 50 kWh | 180 MJ |
| 100 kWh | 360 MJ |
Kilowatt-hour ↔ Megajoule reference table
| Kilowatt-hour → Megajoule | Megajoule → Kilowatt-hour |
|---|---|
| 1 kWh = 3.6 MJ | 1 MJ = 0.2777778 kWh |
| 2 kWh = 7.2 MJ | 2 MJ = 0.5555556 kWh |
| 5 kWh = 18 MJ | 5 MJ = 1.388889 kWh |
| 10 kWh = 36 MJ | 10 MJ = 2.777778 kWh |
| 20 kWh = 72 MJ | 20 MJ = 5.555556 kWh |
| 50 kWh = 180 MJ | 50 MJ = 13.88889 kWh |
| 100 kWh = 360 MJ | 100 MJ = 27.77778 kWh |
| 250 kWh = 900 MJ | 250 MJ = 69.44444 kWh |
| 500 kWh = 1,800 MJ | 500 MJ = 138.8889 kWh |
| 1000 kWh = 3,600 MJ | 1000 MJ = 277.7778 kWh |
About kilowatt-hour and megajoule
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.
Megajoule: A megajoule is 1,000,000 joules (1,000 kJ) — used for larger energy quantities such as the energy content of fuels.
Frequently asked questions
- How many megajoule are in 1 kilowatt-hour?
- 1 kilowatt-hour = 3.6 megajoule (MJ).
- How do I convert kilowatt-hour to megajoule?
- Multiply the number of kilowatt-hour by 3.6. For example, 10 kilowatt-hour = 10 × 3.6 = 36 megajoule.
- How many kilowatt-hour are in 1 megajoule?
- 1 megajoule = 0.2777778 kilowatt-hour.
- Which is bigger, kilowatt-hour or megajoule?
- 1 kilowatt-hour equals 3.6 megajoule, so a kilowatt-hour is the larger unit.