A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Gigajoules to Exajoules
Convert Gigajoule (GJ) to Exajoule (EJ) instantly with an exact formula, conversion table, and FAQ.
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Convert gigajoules (GJ) to exajoules (EJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
EJ = GJ × 1.000000000e-09
Results update instantly for Gigajoules to Exajoules conversions.
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Formula
EJ = GJ × 1.000000000e-09
GJ = EJ × 1000000000
Conversion table
| 1 GJ | 1.000000e-09 EJ |
| 5 GJ | 5.000000e-09 EJ |
| 10 GJ | 1.000000e-08 EJ |
| 20 GJ | 2.000000e-08 EJ |
| 50 GJ | 5.000000e-08 EJ |
| 100 GJ | 1.000000e-07 EJ |
| 500 GJ | 5.000000e-07 EJ |
| 1000 GJ | 0.000001 EJ |
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How the formula works
Both gigajoule and exajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigajoules by 1.000000000e-09 to get exajoules. To reverse the conversion, multiply a exajoule value by 1000000000 to get back to gigajoules.
Frequently asked questions
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
What is Exajoule (EJ)?
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
How do I convert gigajoules to exajoules?
Multiply the gigajoule value by 1.000000000e-09 to get the equivalent in exajoules. For example, 5 GJ × 1.000000000e-09 = 5.000000e-09 EJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-09 is an exact, non-rounded value.
Can I convert exajoules back to gigajoules?
Yes. Divide the exajoule value by 1.000000000e-09, or multiply it by 1000000000, to get gigajoules.
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About converting gigajoules to exajoules
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix. A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Use this calculator to move between gigajoules and exajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.