A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Ergs
Convert Petajoule (PJ) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to ergs (erg) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
erg = PJ × 1.000000000e+22
Results update instantly for Petajoules to Ergs conversions.
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Formula
erg = PJ × 1.000000000e+22
PJ = erg × 1.000000000e-22
Conversion table
| 1 PJ | 1.000000e+22 erg |
| 5 PJ | 5.000000e+22 erg |
| 10 PJ | 1.000000e+23 erg |
| 20 PJ | 2.000000e+23 erg |
| 50 PJ | 5.000000e+23 erg |
| 100 PJ | 1.000000e+24 erg |
| 500 PJ | 5.000000e+24 erg |
| 1000 PJ | 1.000000e+25 erg |
Related conversions
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How the formula works
Both petajoule and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 1.000000000e+22 to get ergs. To reverse the conversion, multiply a erg value by 1.000000000e-22 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 Erg (erg)?
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
How do I convert petajoules to ergs?
Multiply the petajoule value by 1.000000000e+22 to get the equivalent in ergs. For example, 5 PJ × 1.000000000e+22 = 5.000000e+22 erg.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+22 is an exact, non-rounded value.
Can I convert ergs back to petajoules?
Yes. Divide the erg value by 1.000000000e+22, or multiply it by 1.000000000e-22, to get petajoules.
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About converting petajoules to ergs
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Use this calculator to move between petajoules and ergs accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.