A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Joules
Convert Petajoule (PJ) to Joule (J) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to joules (J) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
J = PJ × 1.000000000e+15
Results update instantly for Petajoules to Joules conversions.
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Formula
J = PJ × 1.000000000e+15
PJ = J × 1.000000000e-15
Conversion table
| 1 PJ | 1.000000e+15 J |
| 5 PJ | 5.000000e+15 J |
| 10 PJ | 1.000000e+16 J |
| 20 PJ | 2.000000e+16 J |
| 50 PJ | 5.000000e+16 J |
| 100 PJ | 1.000000e+17 J |
| 500 PJ | 5.000000e+17 J |
| 1000 PJ | 1.000000e+18 J |
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How the formula works
Both petajoule and joule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 1.000000000e+15 to get joules. To reverse the conversion, multiply a joule value by 1.000000000e-15 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 Joule (J)?
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
How do I convert petajoules to joules?
Multiply the petajoule value by 1.000000000e+15 to get the equivalent in joules. For example, 5 PJ × 1.000000000e+15 = 5.000000e+15 J.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+15 is an exact, non-rounded value.
Can I convert joules back to petajoules?
Yes. Divide the joule value by 1.000000000e+15, or multiply it by 1.000000000e-15, to get petajoules.
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About converting petajoules to joules
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
Use this calculator to move between petajoules and joules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.