Megajoules to Megawatt-Hours Converter

Enter the energy in megajoules below to get the value converted to megawatt-hours.


Result in Megawatt-Hours:

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1 MJ = 0.000278 MWh

Do you want to convert megawatt-hours to megajoules?

How to Convert Megajoules to Megawatt-Hours

To convert a measurement in megajoules to a measurement in megawatt-hours, divide the energy by the following conversion ratio: 3,600 megajoules/megawatt-hour.

Since one megawatt-hour is equal to 3,600 megajoules, you can use this simple formula to convert:

megawatt-hours = megajoules ÷ 3,600

The energy in megawatt-hours is equal to the energy in megajoules divided by 3,600.

For example, here's how to convert 5,000 megajoules to megawatt-hours using the formula above.
megawatt-hours = (5,000 MJ ÷ 3,600) = 1.388889 MWh

Megajoules and megawatt-hours are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Megajoule?

One megajoule is equal to 1,000,000 joules, which is the energy equal to the force on an object of one newton at a distance of one meter.

The megajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "mega" is the prefix for millions, or 106. Megajoules can be abbreviated as MJ; for example, 1 megajoule can be written as 1 MJ.

Learn more about megajoules.

What Is a Megawatt-Hour?

A megawatt-hour is a measure of electrical energy equal to one megawatt, or 1,000,000 watts, of power over a one hour period. Megawatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Megawatt-hours are usually abbreviated as MWh, although the formally adopted expression is MW·h. The abbreviation MW h is also sometimes used. For example, 1 megawatt-hour can be written as 1 MWh, 1 MW·h, or 1 MW h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Learn more about megawatt-hours.

Megajoule to Megawatt-Hour Conversion Table

Table showing various megajoule measurements converted to megawatt-hours.
Megajoules Megawatt-hours
1 MJ 0.000278 MWh
2 MJ 0.000556 MWh
3 MJ 0.000833 MWh
4 MJ 0.001111 MWh
5 MJ 0.001389 MWh
6 MJ 0.001667 MWh
7 MJ 0.001944 MWh
8 MJ 0.002222 MWh
9 MJ 0.0025 MWh
10 MJ 0.002778 MWh
20 MJ 0.005556 MWh
30 MJ 0.008333 MWh
40 MJ 0.011111 MWh
50 MJ 0.013889 MWh
60 MJ 0.016667 MWh
70 MJ 0.019444 MWh
80 MJ 0.022222 MWh
90 MJ 0.025 MWh
100 MJ 0.027778 MWh
200 MJ 0.055556 MWh
300 MJ 0.083333 MWh
400 MJ 0.111111 MWh
500 MJ 0.138889 MWh
600 MJ 0.166667 MWh
700 MJ 0.194444 MWh
800 MJ 0.222222 MWh
900 MJ 0.25 MWh
1,000 MJ 0.277778 MWh
2,000 MJ 0.555556 MWh
3,000 MJ 0.833333 MWh
4,000 MJ 1.1111 MWh
5,000 MJ 1.3889 MWh
6,000 MJ 1.6667 MWh
7,000 MJ 1.9444 MWh
8,000 MJ 2.2222 MWh
9,000 MJ 2.5 MWh
10,000 MJ 2.7778 MWh


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019,

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