Gigajoules to Megajoules Converter

Enter the energy in gigajoules below to convert it to megajoules.

Result in Megajoules:

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1 GJ = 1,000 MJ
Learn how we calculate this below

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Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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How to Convert Gigajoules to Megajoules

To convert a measurement in gigajoules to a measurement in megajoules, multiply the energy by the following conversion ratio: 1,000 megajoules/gigajoule.

Since one gigajoule is equal to 1,000 megajoules, you can use this simple formula to convert:

megajoules = gigajoules × 1,000

The energy in megajoules is equal to the energy in gigajoules multiplied by 1,000.

For example, here's how to convert 5 gigajoules to megajoules using the formula above.

megajoules = (5 GJ × 1,000) = 5,000 MJ

How Many Megajoules Are in a Gigajoule?

There are 1,000 megajoules in a gigajoule, which is why we use this value in the formula above.

1 GJ = 1,000 MJ

Gigajoules and megajoules are both units used to measure energy. Keep reading to learn more about each unit of measure.

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.

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.

Gigajoule to Megajoule Conversion Table

Table showing various gigajoule measurements converted to megajoules.
Gigajoules Megajoules
0.001 GJ 1 MJ
0.002 GJ 2 MJ
0.003 GJ 3 MJ
0.004 GJ 4 MJ
0.005 GJ 5 MJ
0.006 GJ 6 MJ
0.007 GJ 7 MJ
0.008 GJ 8 MJ
0.009 GJ 9 MJ
0.01 GJ 10 MJ
0.02 GJ 20 MJ
0.03 GJ 30 MJ
0.04 GJ 40 MJ
0.05 GJ 50 MJ
0.06 GJ 60 MJ
0.07 GJ 70 MJ
0.08 GJ 80 MJ
0.09 GJ 90 MJ
0.1 GJ 100 MJ
0.2 GJ 200 MJ
0.3 GJ 300 MJ
0.4 GJ 400 MJ
0.5 GJ 500 MJ
0.6 GJ 600 MJ
0.7 GJ 700 MJ
0.8 GJ 800 MJ
0.9 GJ 900 MJ
1 GJ 1,000 MJ

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