/convert/megajoules-to-kilowatt-hours/ Convert megajoules (MJ) to kWh instantly. Includes a reference table and formula. article megajoules (MJ) to kWh Converter — 247QuickTools ,{ "@context": "https://schema.org", "@type": "SpeakableSpecification", "cssSelector": [".tool-intro", ".info-gain-section"] }
⚡ Energy

megajoules (MJ) to kWh Converter

Convert megajoules (MJ) to kWh instantly. Includes a reference table and formula.

Quick answer: To convert megajoules (MJ) to kWh, multiply by 0.277778. For example, 1 megajoules (MJ) = 0.277778 kWh. Use the calculator below for any value.
megajoules (MJ) to kWh
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Common conversions
megajoules (MJ) kWh
Formula:

How to convert megajoules (MJ) to kWh

1

Enter your value

Type the number of megajoules (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 megajoules (MJ). Your current value carries across so you don't have to re-enter anything.

3

About megajoules (MJ) and kWh

megajoules (MJ) and kWh are measurement units. Use this converter to switch between them instantly.

💡 Did you know?

3.6 MJ = 1 kWh. UK petrol energy content: 34.2 MJ/litre = 9.5 kWh/litre. An EV doing 4 miles/kWh vs a petrol car doing 40 mpg (6.5 L/100km): same distance requires 9.5 kWh (EV) vs 34.2 MJ × 1 kWh/3.6 MJ × 9.5 = 9.5 kWh per litre equivalent — revealing why EVs are inherently more efficient.

📊 Common conversions at a glance
megajoules (MJ) kWh
1 0.2778
5 1.389
10 2.778
20 5.556
50 13.89
100 27.78
Reviewed for 2026. megajoules (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.