A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Exajoules to Megajoules
Convert Exajoule (EJ) to Megajoule (MJ) instantly with an exact formula, conversion table, and FAQ.
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Convert exajoules (EJ) to megajoules (MJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
MJ = EJ × 1000000000000
Results update instantly for Exajoules to Megajoules conversions.
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Formula
MJ = EJ × 1000000000000
EJ = MJ × 1.000000000e-12
Conversion table
| 1 EJ | 1.000000e+12 MJ |
| 5 EJ | 5.000000e+12 MJ |
| 10 EJ | 1.000000e+13 MJ |
| 20 EJ | 2.000000e+13 MJ |
| 50 EJ | 5.000000e+13 MJ |
| 100 EJ | 1.000000e+14 MJ |
| 500 EJ | 5.000000e+14 MJ |
| 1000 EJ | 1.000000e+15 MJ |
Related conversions
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How the formula works
Both exajoule and megajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in exajoules by 1000000000000 to get megajoules. To reverse the conversion, multiply a megajoule value by 1.000000000e-12 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 Megajoule (MJ)?
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
How do I convert exajoules to megajoules?
Multiply the exajoule value by 1000000000000 to get the equivalent in megajoules. For example, 5 EJ × 1000000000000 = 5.000000e+12 MJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1000000000000 is an exact, non-rounded value.
Can I convert megajoules back to exajoules?
Yes. Divide the megajoule value by 1000000000000, or multiply it by 1.000000000e-12, to get exajoules.
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About converting exajoules to megajoules
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix. A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
Use this calculator to move between exajoules and megajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.