A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Exajoules to Yoctojoules
Convert Exajoule (EJ) to Yoctojoule (yJ) instantly with an exact formula, conversion table, and FAQ.
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Convert exajoules (EJ) to yoctojoules (yJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
yJ = EJ × 1.000000000e+42
Results update instantly for Exajoules to Yoctojoules conversions.
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Formula
yJ = EJ × 1.000000000e+42
EJ = yJ × 1.000000000e-42
Conversion table
| 1 EJ | 1.000000e+42 yJ |
| 5 EJ | 5.000000e+42 yJ |
| 10 EJ | 1.000000e+43 yJ |
| 20 EJ | 2.000000e+43 yJ |
| 50 EJ | 5.000000e+43 yJ |
| 100 EJ | 1.000000e+44 yJ |
| 500 EJ | 5.000000e+44 yJ |
| 1000 EJ | 1.000000e+45 yJ |
Related conversions
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How the formula works
Both exajoule and yoctojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in exajoules by 1.000000000e+42 to get yoctojoules. To reverse the conversion, multiply a yoctojoule value by 1.000000000e-42 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 Yoctojoule (yJ)?
A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
How do I convert exajoules to yoctojoules?
Multiply the exajoule value by 1.000000000e+42 to get the equivalent in yoctojoules. For example, 5 EJ × 1.000000000e+42 = 5.000000e+42 yJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+42 is an exact, non-rounded value.
Can I convert yoctojoules back to exajoules?
Yes. Divide the yoctojoule value by 1.000000000e+42, or multiply it by 1.000000000e-42, to get exajoules.
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About converting exajoules to yoctojoules
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix. A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
Use this calculator to move between exajoules and yoctojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.