A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Exajoules to Femtojoules
Convert Exajoule (EJ) to Femtojoule (fJ) instantly with an exact formula, conversion table, and FAQ.
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Convert exajoules (EJ) to femtojoules (fJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
fJ = EJ × 1.000000000e+33
Results update instantly for Exajoules to Femtojoules conversions.
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Formula
fJ = EJ × 1.000000000e+33
EJ = fJ × 1.000000000e-33
Conversion table
| 1 EJ | 1.000000e+33 fJ |
| 5 EJ | 5.000000e+33 fJ |
| 10 EJ | 1.000000e+34 fJ |
| 20 EJ | 2.000000e+34 fJ |
| 50 EJ | 5.000000e+34 fJ |
| 100 EJ | 1.000000e+35 fJ |
| 500 EJ | 5.000000e+35 fJ |
| 1000 EJ | 1.000000e+36 fJ |
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How the formula works
Both exajoule and femtojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in exajoules by 1.000000000e+33 to get femtojoules. To reverse the conversion, multiply a femtojoule value by 1.000000000e-33 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 Femtojoule (fJ)?
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
How do I convert exajoules to femtojoules?
Multiply the exajoule value by 1.000000000e+33 to get the equivalent in femtojoules. For example, 5 EJ × 1.000000000e+33 = 5.000000e+33 fJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+33 is an exact, non-rounded value.
Can I convert femtojoules back to exajoules?
Yes. Divide the femtojoule value by 1.000000000e+33, or multiply it by 1.000000000e-33, to get exajoules.
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About converting exajoules to femtojoules
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix. A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
Use this calculator to move between exajoules and femtojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.