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 Femtojoules
Convert Yoctojoule (yJ) to Femtojoule (fJ) instantly with an exact formula, conversion table, and FAQ.
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Convert yoctojoules (yJ) to femtojoules (fJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
fJ = yJ × 1.000000000e-09
Results update instantly for Yoctojoules to Femtojoules conversions.
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Formula
fJ = yJ × 1.000000000e-09
yJ = fJ × 1000000000
Conversion table
| 1 yJ | 1.000000e-09 fJ |
| 5 yJ | 5.000000e-09 fJ |
| 10 yJ | 1.000000e-08 fJ |
| 20 yJ | 2.000000e-08 fJ |
| 50 yJ | 5.000000e-08 fJ |
| 100 yJ | 1.000000e-07 fJ |
| 500 yJ | 5.000000e-07 fJ |
| 1000 yJ | 0.000001 fJ |
Related conversions
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How the formula works
Both yoctojoule and femtojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in yoctojoules by 1.000000000e-09 to get femtojoules. To reverse the conversion, multiply a femtojoule value by 1000000000 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 Femtojoule (fJ)?
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
How do I convert yoctojoules to femtojoules?
Multiply the yoctojoule value by 1.000000000e-09 to get the equivalent in femtojoules. For example, 5 yJ × 1.000000000e-09 = 5.000000e-09 fJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-09 is an exact, non-rounded value.
Can I convert femtojoules back to yoctojoules?
Yes. Divide the femtojoule value by 1.000000000e-09, or multiply it by 1000000000, to get yoctojoules.
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About converting yoctojoules to femtojoules
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 femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
Use this calculator to move between yoctojoules and femtojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.