A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Zeptojoules
Convert Petajoule (PJ) to Zeptojoule (zJ) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to zeptojoules (zJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A zeptojoule (zJ) is a metric-prefixed unit of energy equal to 10-21 joules, a fraction of a single joule, using the SI zepto prefix.
zJ = PJ × 1.000000000e+36
Results update instantly for Petajoules to Zeptojoules conversions.
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Formula
zJ = PJ × 1.000000000e+36
PJ = zJ × 1.000000000e-36
Conversion table
| 1 PJ | 1.000000e+36 zJ |
| 5 PJ | 5.000000e+36 zJ |
| 10 PJ | 1.000000e+37 zJ |
| 20 PJ | 2.000000e+37 zJ |
| 50 PJ | 5.000000e+37 zJ |
| 100 PJ | 1.000000e+38 zJ |
| 500 PJ | 5.000000e+38 zJ |
| 1000 PJ | 1.000000e+39 zJ |
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How the formula works
Both petajoule and zeptojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 1.000000000e+36 to get zeptojoules. To reverse the conversion, multiply a zeptojoule value by 1.000000000e-36 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 Zeptojoule (zJ)?
A zeptojoule (zJ) is a metric-prefixed unit of energy equal to 10-21 joules, a fraction of a single joule, using the SI zepto prefix.
How do I convert petajoules to zeptojoules?
Multiply the petajoule value by 1.000000000e+36 to get the equivalent in zeptojoules. For example, 5 PJ × 1.000000000e+36 = 5.000000e+36 zJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+36 is an exact, non-rounded value.
Can I convert zeptojoules back to petajoules?
Yes. Divide the zeptojoule value by 1.000000000e+36, or multiply it by 1.000000000e-36, to get petajoules.
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About converting petajoules to zeptojoules
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. A zeptojoule (zJ) is a metric-prefixed unit of energy equal to 10-21 joules, a fraction of a single joule, using the SI zepto prefix.
Use this calculator to move between petajoules and zeptojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.