A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro prefix.
Microjoules to Yoctojoules
Convert Microjoule (uJ) to Yoctojoule (yJ) instantly with an exact formula, conversion table, and FAQ.
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Convert microjoules (uJ) 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 = uJ × 1.000000000e+18
Results update instantly for Microjoules to Yoctojoules conversions.
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Formula
yJ = uJ × 1.000000000e+18
uJ = yJ × 1.000000000e-18
Conversion table
| 1 uJ | 1.000000e+18 yJ |
| 5 uJ | 5.000000e+18 yJ |
| 10 uJ | 1.000000e+19 yJ |
| 20 uJ | 2.000000e+19 yJ |
| 50 uJ | 5.000000e+19 yJ |
| 100 uJ | 1.000000e+20 yJ |
| 500 uJ | 5.000000e+20 yJ |
| 1000 uJ | 1.000000e+21 yJ |
Related conversions
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How the formula works
Both microjoule and yoctojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in microjoules by 1.000000000e+18 to get yoctojoules. To reverse the conversion, multiply a yoctojoule value by 1.000000000e-18 to get back to microjoules.
Frequently asked questions
What is Microjoule (uJ)?
A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro 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 microjoules to yoctojoules?
Multiply the microjoule value by 1.000000000e+18 to get the equivalent in yoctojoules. For example, 5 uJ × 1.000000000e+18 = 5.000000e+18 yJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+18 is an exact, non-rounded value.
Can I convert yoctojoules back to microjoules?
Yes. Divide the yoctojoule value by 1.000000000e+18, or multiply it by 1.000000000e-18, to get microjoules.
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About converting microjoules to yoctojoules
A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro 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 microjoules 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.