A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Zettajoules
Convert Petajoule (PJ) to Zettajoule (ZJ) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to zettajoules (ZJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
ZJ = PJ × 0.000001
Results update instantly for Petajoules to Zettajoules conversions.
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Formula
ZJ = PJ × 0.000001
PJ = ZJ × 1000000
Conversion table
| 1 PJ | 0.000001 ZJ |
| 5 PJ | 0.000005 ZJ |
| 10 PJ | 0.000010 ZJ |
| 20 PJ | 0.000020 ZJ |
| 50 PJ | 0.000050 ZJ |
| 100 PJ | 0.000100 ZJ |
| 500 PJ | 0.000500 ZJ |
| 1000 PJ | 0.001000 ZJ |
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How the formula works
Both petajoule and zettajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 0.000001 to get zettajoules. To reverse the conversion, multiply a zettajoule value by 1000000 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 Zettajoule (ZJ)?
A zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
How do I convert petajoules to zettajoules?
Multiply the petajoule value by 0.000001 to get the equivalent in zettajoules. For example, 5 PJ × 0.000001 = 0.000005 ZJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.000001 is an exact, non-rounded value.
Can I convert zettajoules back to petajoules?
Yes. Divide the zettajoule value by 0.000001, or multiply it by 1000000, to get petajoules.
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About converting petajoules to zettajoules
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. A zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
Use this calculator to move between petajoules and zettajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.