⚡ Energy
megajoules to kWh Converter
Convert megajoules to kWh instantly with a reference conversion table.
Quick answer: To convert megajoules to kWh, multiply by 0.277778. For example, 1 megajoules = 0.277778 kWh. Use the calculator below for any value.
megajoules to kWh
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Common conversions
| megajoules | kWh |
|---|
Formula:
How to convert megajoules to kWh
1
Enter your value
Type the number of megajoules 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 megajoules. Your current value carries across so you don't have to re-enter anything.
3
About megajoules and kWh
megajoules and kWh are common energy measurements.
💡 Did you know?
1 kWh = 3.6 MJ exactly. A standard UK electricity unit is 1 kWh. At 28p/kWh (UK 2026 average), 1 MJ of electricity costs about 7.8p. The energy content of 1 litre of petrol is approximately 34.2 MJ = 9.5 kWh.
📊 Common conversions at a glance
| megajoules | kWh |
|---|---|
| 0.1 | 0.02778 |
| 0.5 | 0.1389 |
| 1 | 0.2778 |
| 3.6 | 1 |
| 5 | 1.389 |
| 10 | 2.778 |
Reviewed for 2026. megajoules ↔ 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.