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.
Yoctojoules to Attojoules
Convert Yoctojoule (yJ) to Attojoule (aJ) instantly with an exact formula, conversion table, and FAQ.
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Convert yoctojoules (yJ) to attojoules (aJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix.
aJ = yJ × 0.000001
Results update instantly for Yoctojoules to Attojoules conversions.
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Formula
aJ = yJ × 0.000001
yJ = aJ × 1000000
Conversion table
| 1 yJ | 0.000001 aJ |
| 5 yJ | 0.000005 aJ |
| 10 yJ | 0.000010 aJ |
| 20 yJ | 0.000020 aJ |
| 50 yJ | 0.000050 aJ |
| 100 yJ | 0.000100 aJ |
| 500 yJ | 0.000500 aJ |
| 1000 yJ | 0.001000 aJ |
Related conversions
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How the formula works
Both yoctojoule and attojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in yoctojoules by 0.000001 to get attojoules. To reverse the conversion, multiply a attojoule value by 1000000 to get back to yoctojoules.
Frequently asked questions
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.
What is Attojoule (aJ)?
A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix.
How do I convert yoctojoules to attojoules?
Multiply the yoctojoule value by 0.000001 to get the equivalent in attojoules. For example, 5 yJ × 0.000001 = 0.000005 aJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.000001 is an exact, non-rounded value.
Can I convert attojoules back to yoctojoules?
Yes. Divide the attojoule value by 0.000001, or multiply it by 1000000, to get yoctojoules.
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About converting yoctojoules to attojoules
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. A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix.
Use this calculator to move between yoctojoules and attojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.