Kilowatt-hours to Megajoules
Type a value in Kilowatt-hours and get the result in Megajoules, calculated exactly.
100 Kilowatt-hours = 360 Megajoules
Precision
Exact factorThis result is exact.
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Formula
MJ = kWh × 3.6
To convert Kilowatt-hours to Megajoules, multiply the value by 3.6.
Worked examples
- 1 kWh × 3.6 = 3.6 MJ
- 100 kWh × 3.6 = 360 MJ
- 50 kWh × 3.6 = 180 MJ
This factor is exact by definition.
Conversion table
| Kilowatt-hours (kWh) | Megajoules (MJ) |
|---|---|
| 1 | 3.6 |
| 2 | 7.2 |
| 3 | 10.8 |
| 4 | 14.4 |
| 5 | 18 |
| 6 | 21.6 |
| 7 | 25.2 |
| 8 | 28.8 |
| 9 | 32.4 |
| 10 | 36 |
| 15 | 54 |
| 20 | 72 |
| 25 | 90 |
| 30 | 108 |
| 40 | 144 |
| 50 | 180 |
| 60 | 216 |
| 70 | 252 |
| 75 | 270 |
| 80 | 288 |
| 90 | 324 |
| 100 | 360 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Megajoules to Kilowatt-hours
| Megajoules (MJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 | ≈ 0.2777778 |
| 2 | ≈ 0.5555556 |
| 3 | ≈ 0.8333333 |
| 4 | ≈ 1.111111 |
| 5 | ≈ 1.388889 |
| 6 | ≈ 1.666667 |
| 7 | ≈ 1.944444 |
| 8 | ≈ 2.222222 |
| 9 | 2.5 |
| 10 | ≈ 2.777778 |
| 15 | ≈ 4.166667 |
| 20 | ≈ 5.555556 |
| 25 | ≈ 6.944444 |
| 30 | ≈ 8.333333 |
| 40 | ≈ 11.11111 |
| 50 | ≈ 13.88889 |
| 60 | ≈ 16.66667 |
| 70 | ≈ 19.44444 |
| 75 | ≈ 20.83333 |
| 80 | ≈ 22.22222 |
| 90 | 25 |
| 100 | ≈ 27.77778 |
Unit definitions
- Kilowatt-hours kWh
- One kilowatt for one hour: exactly 3.6 megajoules; the unit on electricity bills.
- Megajoules MJ
- Exactly 1 000 000 joules.
Questions people ask
Kilowatt-hours to Megajoules: what is the conversion factor?
One kWh is 3.6 MJ.
How do I convert Kilowatt-hours to Megajoules?
Use the formula above. For example, 100 kWh = 360 MJ.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.