A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Yoctojoules
Convert Petajoule (PJ) to Yoctojoule (yJ) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Energy calculator
Energy Converter
Convert petajoules (PJ) to yoctojoules (yJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
yJ = PJ × 1.000000000e+39
Results update instantly for Petajoules to Yoctojoules conversions.
Reserved above the conversion cards and below the converter.
Formula
yJ = PJ × 1.000000000e+39
PJ = yJ × 1.000000000e-39
Conversion table
| 1 PJ | 1.000000e+39 yJ |
| 5 PJ | 5.000000e+39 yJ |
| 10 PJ | 1.000000e+40 yJ |
| 20 PJ | 2.000000e+40 yJ |
| 50 PJ | 5.000000e+40 yJ |
| 100 PJ | 1.000000e+41 yJ |
| 500 PJ | 5.000000e+41 yJ |
| 1000 PJ | 1.000000e+42 yJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both petajoule and yoctojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 1.000000000e+39 to get yoctojoules. To reverse the conversion, multiply a yoctojoule value by 1.000000000e-39 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 Yoctojoule (yJ)?
A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
How do I convert petajoules to yoctojoules?
Multiply the petajoule value by 1.000000000e+39 to get the equivalent in yoctojoules. For example, 5 PJ × 1.000000000e+39 = 5.000000e+39 yJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+39 is an exact, non-rounded value.
Can I convert yoctojoules back to petajoules?
Yes. Divide the yoctojoule value by 1.000000000e+39, or multiply it by 1.000000000e-39, to get petajoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting petajoules to yoctojoules
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
Use this calculator to move between petajoules and yoctojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.