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.
Joules to Petajoules
Convert Joule (J) to Petajoule (PJ) instantly with an exact formula, conversion table, and FAQ.
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Convert joules (J) to petajoules (PJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
PJ = J × 1.000000000e-15
Results update instantly for Joules to Petajoules conversions.
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Formula
PJ = J × 1.000000000e-15
J = PJ × 1.000000000e+15
Conversion table
| 1 J | 1.000000e-15 PJ |
| 5 J | 5.000000e-15 PJ |
| 10 J | 1.000000e-14 PJ |
| 20 J | 2.000000e-14 PJ |
| 50 J | 5.000000e-14 PJ |
| 100 J | 1.000000e-13 PJ |
| 500 J | 5.000000e-13 PJ |
| 1000 J | 1.000000e-12 PJ |
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How the formula works
Both joule and petajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in joules by 1.000000000e-15 to get petajoules. To reverse the conversion, multiply a petajoule value by 1.000000000e+15 to get back to joules.
Frequently asked questions
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.
What is Petajoule (PJ)?
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
How do I convert joules to petajoules?
Multiply the joule value by 1.000000000e-15 to get the equivalent in petajoules. For example, 5 J × 1.000000000e-15 = 5.000000e-15 PJ.
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 petajoules back to joules?
Yes. Divide the petajoule value by 1.000000000e-15, or multiply it by 1.000000000e+15, to get joules.
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About converting joules to petajoules
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. A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Use this calculator to move between joules and petajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.