A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Exajoules
Convert Petajoule (PJ) to Exajoule (EJ) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to exajoules (EJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
EJ = PJ × 0.001
Results update instantly for Petajoules to Exajoules conversions.
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Formula
EJ = PJ × 0.001
PJ = EJ × 1000
Conversion table
| 1 PJ | 0.001000 EJ |
| 5 PJ | 0.005000 EJ |
| 10 PJ | 0.010000 EJ |
| 20 PJ | 0.020000 EJ |
| 50 PJ | 0.050000 EJ |
| 100 PJ | 0.100000 EJ |
| 500 PJ | 0.500000 EJ |
| 1000 PJ | 1 EJ |
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How the formula works
Both petajoule and exajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 0.001 to get exajoules. To reverse the conversion, multiply a exajoule value by 1000 to get back to petajoules.
Frequently asked questions
What is Petajoule (PJ)?
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
What is Exajoule (EJ)?
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
How do I convert petajoules to exajoules?
Multiply the petajoule value by 0.001 to get the equivalent in exajoules. For example, 5 PJ × 0.001 = 0.005000 EJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.001 is an exact, non-rounded value.
Can I convert exajoules back to petajoules?
Yes. Divide the exajoule value by 0.001, or multiply it by 1000, to get petajoules.
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About converting petajoules to exajoules
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Use this calculator to move between petajoules and exajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.