A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Gigajoules to Yoctojoules
Convert Gigajoule (GJ) to Yoctojoule (yJ) instantly with an exact formula, conversion table, and FAQ.
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Convert gigajoules (GJ) to yoctojoules (yJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
yJ = GJ × 1.000000000e+33
Results update instantly for Gigajoules to Yoctojoules conversions.
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Formula
yJ = GJ × 1.000000000e+33
GJ = yJ × 1.000000000e-33
Conversion table
| 1 GJ | 1.000000e+33 yJ |
| 5 GJ | 5.000000e+33 yJ |
| 10 GJ | 1.000000e+34 yJ |
| 20 GJ | 2.000000e+34 yJ |
| 50 GJ | 5.000000e+34 yJ |
| 100 GJ | 1.000000e+35 yJ |
| 500 GJ | 5.000000e+35 yJ |
| 1000 GJ | 1.000000e+36 yJ |
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How the formula works
Both gigajoule and yoctojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigajoules by 1.000000000e+33 to get yoctojoules. To reverse the conversion, multiply a yoctojoule value by 1.000000000e-33 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 Yoctojoule (yJ)?
A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
How do I convert gigajoules to yoctojoules?
Multiply the gigajoule value by 1.000000000e+33 to get the equivalent in yoctojoules. For example, 5 GJ × 1.000000000e+33 = 5.000000e+33 yJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+33 is an exact, non-rounded value.
Can I convert yoctojoules back to gigajoules?
Yes. Divide the yoctojoule value by 1.000000000e+33, or multiply it by 1.000000000e-33, to get gigajoules.
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About converting gigajoules to yoctojoules
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix. A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
Use this calculator to move between gigajoules and yoctojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.