Megawatt-Hours to Gigajoules Converter

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


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Result in Gigajoules:

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1 MWh = 3.6 GJ

Do you want to convert gigajoules to megawatt-hours?

How to Convert Megawatt-Hours to Gigajoules

To convert a measurement in megawatt-hours to a measurement in gigajoules, multiply the energy by the following conversion ratio: 3.6 gigajoules/megawatt-hour.

Since one megawatt-hour is equal to 3.6 gigajoules, you can use this simple formula to convert:

gigajoules = megawatt-hours × 3.6

The energy in gigajoules is equal to the energy in megawatt-hours multiplied by 3.6.

For example, here's how to convert 5 megawatt-hours to gigajoules using the formula above.
gigajoules = (5 MWh × 3.6) = 18 GJ

How Many Gigajoules Are in a Megawatt-Hour?

There are 3.6 gigajoules in a megawatt-hour, which is why we use this value in the formula above.

1 MWh = 3.6 GJ

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

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.

What Is a Gigajoule?

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

The gigajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "giga" is the prefix for billions, or 109. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.

Learn more about gigajoules.

Megawatt-Hour to Gigajoule Conversion Table

Table showing various megawatt-hour measurements converted to gigajoules.
Megawatt-hours Gigajoules
1 MWh 3.6 GJ
2 MWh 7.2 GJ
3 MWh 10.8 GJ
4 MWh 14.4 GJ
5 MWh 18 GJ
6 MWh 21.6 GJ
7 MWh 25.2 GJ
8 MWh 28.8 GJ
9 MWh 32.4 GJ
10 MWh 36 GJ
11 MWh 39.6 GJ
12 MWh 43.2 GJ
13 MWh 46.8 GJ
14 MWh 50.4 GJ
15 MWh 54 GJ
16 MWh 57.6 GJ
17 MWh 61.2 GJ
18 MWh 64.8 GJ
19 MWh 68.4 GJ
20 MWh 72 GJ
21 MWh 75.6 GJ
22 MWh 79.2 GJ
23 MWh 82.8 GJ
24 MWh 86.4 GJ
25 MWh 90 GJ
26 MWh 93.6 GJ
27 MWh 97.2 GJ
28 MWh 100.8 GJ
29 MWh 104.4 GJ
30 MWh 108 GJ
31 MWh 111.6 GJ
32 MWh 115.2 GJ
33 MWh 118.8 GJ
34 MWh 122.4 GJ
35 MWh 126 GJ
36 MWh 129.6 GJ
37 MWh 133.2 GJ
38 MWh 136.8 GJ
39 MWh 140.4 GJ
40 MWh 144 GJ


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

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