A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Attojoules
Convert Petajoule (PJ) to Attojoule (aJ) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to attojoules (aJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix.
aJ = PJ × 1.000000000e+33
Results update instantly for Petajoules to Attojoules conversions.
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Formula
aJ = PJ × 1.000000000e+33
PJ = aJ × 1.000000000e-33
Conversion table
| 1 PJ | 1.000000e+33 aJ |
| 5 PJ | 5.000000e+33 aJ |
| 10 PJ | 1.000000e+34 aJ |
| 20 PJ | 2.000000e+34 aJ |
| 50 PJ | 5.000000e+34 aJ |
| 100 PJ | 1.000000e+35 aJ |
| 500 PJ | 5.000000e+35 aJ |
| 1000 PJ | 1.000000e+36 aJ |
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How the formula works
Both petajoule and attojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 1.000000000e+33 to get attojoules. To reverse the conversion, multiply a attojoule value by 1.000000000e-33 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 Attojoule (aJ)?
A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix.
How do I convert petajoules to attojoules?
Multiply the petajoule value by 1.000000000e+33 to get the equivalent in attojoules. For example, 5 PJ × 1.000000000e+33 = 5.000000e+33 aJ.
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 attojoules back to petajoules?
Yes. Divide the attojoule value by 1.000000000e+33, or multiply it by 1.000000000e-33, to get petajoules.
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About converting petajoules to attojoules
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix.
Use this calculator to move between petajoules and attojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.