GJ → MJ converter

Convert gigajoule to megajoule (Energy)

1 GJ = 1000 MJ · 1 MJ = 0.001 GJ

Common values: 10 GJ 50 GJ 100 GJ 500 GJ 1000 GJ

100 GJ = 100000 MJ

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Gigajoule to megajoule Conversion

1 gigajoule (GJ) is equal to 1000 megajoule (MJ).

1 GJ = 1000 MJ

or

1 MJ = 0.001 GJ

Formula

To convert a energy from gigajoule (GJ) to megajoule (MJ), multiply the energy in gigajoule by 1000

e(MJ) = e(GJ) × 1000

Examples:

Convert 100 gigajoule to megajoule:

e(MJ) = 100GJ × 1000 = 100000 MJ

Conversion table

Gigajoule (GJ) Megajoule (MJ)
1 GJ 1000 MJ
2 GJ 2000 MJ
3 GJ 3000 MJ
5 GJ 5000 MJ
10 GJ 10000 MJ
20 GJ 20000 MJ
25 GJ 25000 MJ
50 GJ 50000 MJ
100 GJ 100000 MJ
250 GJ 250000 MJ
500 GJ 500000 MJ
1000 GJ 1000000 MJ
Megajoule (MJ) Gigajoule (GJ)
1 MJ 0.001 GJ
2 MJ 0.002 GJ
3 MJ 0.003 GJ
5 MJ 0.005 GJ
10 MJ 0.01 GJ
20 MJ 0.02 GJ
25 MJ 0.025 GJ
50 MJ 0.05 GJ
100 MJ 0.1 GJ
250 MJ 0.25 GJ
500 MJ 0.5 GJ
1000 MJ 1 GJ

Frequently asked questions

How do I convert gigajoule to megajoule?

Multiply the value in gigajoule by 1000 to get the result in megajoule. For example, 5 GJ × 1000 = 5000 MJ.

How many megajoule are in 1 gigajoule?

1 gigajoule (GJ) is equal to 1000 megajoule (MJ).

How do I convert megajoule back to gigajoule?

Use the inverse operation: divide the value in megajoule by 1000 to get the result in gigajoule.

How accurate is the gigajoule to megajoule conversion?

The converter multiplies by the conversion factor 1000 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.

Sources

Conversion factors are based on internationally recognised standards:

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