A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Gigajoules to Picojoules
Convert Gigajoule (GJ) to Picojoule (pJ) instantly with an exact formula, conversion table, and FAQ.
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Convert gigajoules (GJ) to picojoules (pJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
pJ = GJ × 1.000000000e+21
Results update instantly for Gigajoules to Picojoules conversions.
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Formula
pJ = GJ × 1.000000000e+21
GJ = pJ × 1.000000000e-21
Conversion table
| 1 GJ | 1.000000e+21 pJ |
| 5 GJ | 5.000000e+21 pJ |
| 10 GJ | 1.000000e+22 pJ |
| 20 GJ | 2.000000e+22 pJ |
| 50 GJ | 5.000000e+22 pJ |
| 100 GJ | 1.000000e+23 pJ |
| 500 GJ | 5.000000e+23 pJ |
| 1000 GJ | 1.000000e+24 pJ |
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How the formula works
Both gigajoule and picojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigajoules by 1.000000000e+21 to get picojoules. To reverse the conversion, multiply a picojoule value by 1.000000000e-21 to get back to gigajoules.
Frequently asked questions
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
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.
How do I convert gigajoules to picojoules?
Multiply the gigajoule value by 1.000000000e+21 to get the equivalent in picojoules. For example, 5 GJ × 1.000000000e+21 = 5.000000e+21 pJ.
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 picojoules back to gigajoules?
Yes. Divide the picojoule value by 1.000000000e+21, or multiply it by 1.000000000e-21, to get gigajoules.
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About converting gigajoules to picojoules
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix. 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.
Use this calculator to move between gigajoules and picojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.