A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Exajoules to Gigajoules
Convert Exajoule (EJ) to Gigajoule (GJ) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Energy calculator
Energy Converter
Convert exajoules (EJ) to gigajoules (GJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
GJ = EJ × 1000000000
Results update instantly for Exajoules to Gigajoules conversions.
Reserved above the conversion cards and below the converter.
Formula
GJ = EJ × 1000000000
EJ = GJ × 1.000000000e-09
Conversion table
| 1 EJ | 1.000000e+09 GJ |
| 5 EJ | 5.000000e+09 GJ |
| 10 EJ | 1.000000e+10 GJ |
| 20 EJ | 2.000000e+10 GJ |
| 50 EJ | 5.000000e+10 GJ |
| 100 EJ | 1.000000e+11 GJ |
| 500 EJ | 5.000000e+11 GJ |
| 1000 EJ | 1.000000e+12 GJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both exajoule and gigajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in exajoules by 1000000000 to get gigajoules. To reverse the conversion, multiply a gigajoule value by 1.000000000e-09 to get back to exajoules.
Frequently asked questions
What is Exajoule (EJ)?
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
How do I convert exajoules to gigajoules?
Multiply the exajoule value by 1000000000 to get the equivalent in gigajoules. For example, 5 EJ × 1000000000 = 5.000000e+09 GJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1000000000 is an exact, non-rounded value.
Can I convert gigajoules back to exajoules?
Yes. Divide the gigajoule value by 1000000000, or multiply it by 1.000000000e-09, to get exajoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting exajoules to gigajoules
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix. A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Use this calculator to move between exajoules and gigajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.