⚡ Energy
MJ to kWh Converter
Convert MJ to kWh instantly with a reference table.
Quick answer: To convert MJ to kWh, multiply by 0.277778. For example, 1 MJ = 0.277778 kWh. Use the calculator below for any value.
MJ to kWh
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Common conversions
| MJ | kWh |
|---|
Formula:
How to convert MJ to kWh
1
Enter your value
Type the number of mj you want to convert into the left box. The result in kwh appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — kWh to MJ. Your current value carries across so you don't have to re-enter anything.
3
About MJ and kWh
MJ and kWh are common energy measurements.
💡 Did you know?
1 kWh = 3.6 MJ. A litre of petrol contains 34.2 MJ = 9.5 kWh of energy. A litre of diesel: 37.5 MJ = 10.4 kWh. This is why petrol and diesel fuel are so energy-dense compared to batteries: a 50 L petrol tank stores 1,710 MJ = 475 kWh — more than most EVs' batteries.
📊 Common conversions at a glance
| MJ | kWh |
|---|---|
| 0.1 | 0.02778 |
| 0.5 | 0.1389 |
| 1 | 0.2778 |
| 2 | 0.5556 |
| 3.6 | 1 |
| 5 | 1.389 |
Reviewed for 2026. MJ ↔ kWh conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.