A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Kilojoules
Convert Petajoule (PJ) to Kilojoule (kJ) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to kilojoules (kJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
kJ = PJ × 1000000000000
Results update instantly for Petajoules to Kilojoules conversions.
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Formula
kJ = PJ × 1000000000000
PJ = kJ × 1.000000000e-12
Conversion table
| 1 PJ | 1.000000e+12 kJ |
| 5 PJ | 5.000000e+12 kJ |
| 10 PJ | 1.000000e+13 kJ |
| 20 PJ | 2.000000e+13 kJ |
| 50 PJ | 5.000000e+13 kJ |
| 100 PJ | 1.000000e+14 kJ |
| 500 PJ | 5.000000e+14 kJ |
| 1000 PJ | 1.000000e+15 kJ |
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How the formula works
Both petajoule and kilojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 1000000000000 to get kilojoules. To reverse the conversion, multiply a kilojoule value by 1.000000000e-12 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 Kilojoule (kJ)?
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
How do I convert petajoules to kilojoules?
Multiply the petajoule value by 1000000000000 to get the equivalent in kilojoules. For example, 5 PJ × 1000000000000 = 5.000000e+12 kJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1000000000000 is an exact, non-rounded value.
Can I convert kilojoules back to petajoules?
Yes. Divide the kilojoule value by 1000000000000, or multiply it by 1.000000000e-12, to get petajoules.
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About converting petajoules to kilojoules
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
Use this calculator to move between petajoules and kilojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.