A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Hectojoules
Convert Petajoule (PJ) to Hectojoule (hJ) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to hectojoules (hJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
hJ = PJ × 10000000000000
Results update instantly for Petajoules to Hectojoules conversions.
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Formula
hJ = PJ × 10000000000000
PJ = hJ × 1.000000000e-13
Conversion table
| 1 PJ | 1.000000e+13 hJ |
| 5 PJ | 5.000000e+13 hJ |
| 10 PJ | 1.000000e+14 hJ |
| 20 PJ | 2.000000e+14 hJ |
| 50 PJ | 5.000000e+14 hJ |
| 100 PJ | 1.000000e+15 hJ |
| 500 PJ | 5.000000e+15 hJ |
| 1000 PJ | 1.000000e+16 hJ |
Related conversions
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How the formula works
Both petajoule and hectojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 10000000000000 to get hectojoules. To reverse the conversion, multiply a hectojoule value by 1.000000000e-13 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 Hectojoule (hJ)?
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
How do I convert petajoules to hectojoules?
Multiply the petajoule value by 10000000000000 to get the equivalent in hectojoules. For example, 5 PJ × 10000000000000 = 5.000000e+13 hJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 10000000000000 is an exact, non-rounded value.
Can I convert hectojoules back to petajoules?
Yes. Divide the hectojoule value by 10000000000000, or multiply it by 1.000000000e-13, to get petajoules.
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About converting petajoules to hectojoules
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
Use this calculator to move between petajoules and hectojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.