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Energy Converter

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... Gigajoule = ... Megajoule

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... Gigajoule

... Megajoule

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Use this page to convert gigajoule values into megajoule, with background details, formulas, a worked example, and a quick conversion table.

1 GJ = 1,000 MJ

1 MJ = 0.001 GJ

Example: 120 GJ = 120,000 MJ

Gigajoule (GJ) is represented in this converter as 1000000000 joules.

History: Gigajoule follows SI prefix conventions for scaling joules up or down by powers of ten.

Current use: Gigajoule is useful in science, engineering, and technical energy comparisons.

Also written as GJ.

A megajoule equals one million joules.

History: It follows the SI mega prefix for scaling joules by powers of ten.

Current use: Megajoules are used in fuel values, engineering, and energy reporting.

Also written as MJ, megajoules.