A picojoule (pJ) is a metric-prefixed unit of energy equal to 10-12 joules, a fraction of a single joule, using the SI pico prefix.
Picojoules to Gigajoules
Convert Picojoule (pJ) to Gigajoule (GJ) instantly with an exact formula, conversion table, and FAQ.
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Convert picojoules (pJ) to gigajoules (GJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
GJ = pJ × 1.000000000e-21
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Formula
GJ = pJ × 1.000000000e-21
pJ = GJ × 1.000000000e+21
Conversion table
| 1 pJ | 1.000000e-21 GJ |
| 5 pJ | 5.000000e-21 GJ |
| 10 pJ | 1.000000e-20 GJ |
| 20 pJ | 2.000000e-20 GJ |
| 50 pJ | 5.000000e-20 GJ |
| 100 pJ | 1.000000e-19 GJ |
| 500 pJ | 5.000000e-19 GJ |
| 1000 pJ | 1.000000e-18 GJ |
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How the formula works
Both picojoule and gigajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in picojoules by 1.000000000e-21 to get gigajoules. To reverse the conversion, multiply a gigajoule value by 1.000000000e+21 to get back to picojoules.
Frequently asked questions
What is Picojoule (pJ)?
A picojoule (pJ) is a metric-prefixed unit of energy equal to 10-12 joules, a fraction of a single joule, using the SI pico prefix.
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
How do I convert picojoules to gigajoules?
Multiply the picojoule value by 1.000000000e-21 to get the equivalent in gigajoules. For example, 5 pJ × 1.000000000e-21 = 5.000000e-21 GJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-21 is an exact, non-rounded value.
Can I convert gigajoules back to picojoules?
Yes. Divide the gigajoule value by 1.000000000e-21, or multiply it by 1.000000000e+21, to get picojoules.
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About converting picojoules to gigajoules
A picojoule (pJ) is a metric-prefixed unit of energy equal to 10-12 joules, a fraction of a single joule, using the SI pico prefix. A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Use this calculator to move between picojoules and gigajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.