A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Exajoules to Joules
Convert Exajoule (EJ) to Joule (J) instantly with an exact formula, conversion table, and FAQ.
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Convert exajoules (EJ) to joules (J) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
J = EJ × 1.000000000e+18
Results update instantly for Exajoules to Joules conversions.
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Formula
J = EJ × 1.000000000e+18
EJ = J × 1.000000000e-18
Conversion table
| 1 EJ | 1.000000e+18 J |
| 5 EJ | 5.000000e+18 J |
| 10 EJ | 1.000000e+19 J |
| 20 EJ | 2.000000e+19 J |
| 50 EJ | 5.000000e+19 J |
| 100 EJ | 1.000000e+20 J |
| 500 EJ | 5.000000e+20 J |
| 1000 EJ | 1.000000e+21 J |
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How the formula works
Both exajoule and joule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in exajoules by 1.000000000e+18 to get joules. To reverse the conversion, multiply a joule value by 1.000000000e-18 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 Joule (J)?
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
How do I convert exajoules to joules?
Multiply the exajoule value by 1.000000000e+18 to get the equivalent in joules. For example, 5 EJ × 1.000000000e+18 = 5.000000e+18 J.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+18 is an exact, non-rounded value.
Can I convert joules back to exajoules?
Yes. Divide the joule value by 1.000000000e+18, or multiply it by 1.000000000e-18, to get exajoules.
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About converting exajoules to joules
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix. The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
Use this calculator to move between exajoules and joules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.