Gigajoules to Joules Converter

Enter the energy in gigajoules below to get the value converted to joules.


Result in Joules:

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1 GJ = 1,000,000,000 J

Do you want to convert joules to gigajoules?

How to Convert Gigajoules to Joules

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

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

joules = gigajoules × 1,000,000,000

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

For example, here's how to convert 5 gigajoules to joules using the formula above.
joules = (5 GJ × 1,000,000,000) = 5,000,000,000 J

How Many Joules Are in a Gigajoule?

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

1 GJ = 1,000,000,000 J

Gigajoules and joules 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 Joule?

The joule is the energy equal to the force on an object of one newton at a distance of one meter.[1] One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

Learn more about joules.

Gigajoule to Joule Conversion Table

Table showing various gigajoule measurements converted to joules.
Gigajoules Joules
0.000000001 GJ 1 J
0.000000002 GJ 2 J
0.000000003 GJ 3 J
0.000000004 GJ 4 J
0.000000005 GJ 5 J
0.000000006 GJ 6 J
0.000000007 GJ 7 J
0.000000008 GJ 8 J
0.000000009 GJ 9 J
0.0000000001 GJ 0.1 J
0.000000001 GJ 1 J
0.00000001 GJ 10 J
0.0000001 GJ 100 J
0.000001 GJ 1,000 J
0.00001 GJ 10,000 J
0.0001 GJ 100,000 J
0.001 GJ 1,000,000 J
0.01 GJ 10,000,000 J
0.1 GJ 100,000,000 J
1 GJ 1,000,000,000 J


  1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019,

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