A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
Kilojoules to Petajoules
Convert Kilojoule (kJ) to Petajoule (PJ) instantly with an exact formula, conversion table, and FAQ.
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Convert kilojoules (kJ) to petajoules (PJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
PJ = kJ × 1.000000000e-12
Results update instantly for Kilojoules to Petajoules conversions.
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Formula
PJ = kJ × 1.000000000e-12
kJ = PJ × 1000000000000
Conversion table
| 1 kJ | 1.000000e-12 PJ |
| 5 kJ | 5.000000e-12 PJ |
| 10 kJ | 1.000000e-11 PJ |
| 20 kJ | 2.000000e-11 PJ |
| 50 kJ | 5.000000e-11 PJ |
| 100 kJ | 1.000000e-10 PJ |
| 500 kJ | 5.000000e-10 PJ |
| 1000 kJ | 1.000000e-09 PJ |
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How the formula works
Both kilojoule and petajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilojoules by 1.000000000e-12 to get petajoules. To reverse the conversion, multiply a petajoule value by 1000000000000 to get back to kilojoules.
Frequently asked questions
What is Kilojoule (kJ)?
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
What is Petajoule (PJ)?
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
How do I convert kilojoules to petajoules?
Multiply the kilojoule value by 1.000000000e-12 to get the equivalent in petajoules. For example, 5 kJ × 1.000000000e-12 = 5.000000e-12 PJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-12 is an exact, non-rounded value.
Can I convert petajoules back to kilojoules?
Yes. Divide the petajoule value by 1.000000000e-12, or multiply it by 1000000000000, to get kilojoules.
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About converting kilojoules to petajoules
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States. A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Use this calculator to move between kilojoules and petajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.