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 Attojoules
Convert Microjoule (uJ) to Attojoule (aJ) instantly with an exact formula, conversion table, and FAQ.
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Convert microjoules (uJ) 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 = uJ × 1000000000000
Results update instantly for Microjoules to Attojoules conversions.
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Formula
aJ = uJ × 1000000000000
uJ = aJ × 1.000000000e-12
Conversion table
| 1 uJ | 1.000000e+12 aJ |
| 5 uJ | 5.000000e+12 aJ |
| 10 uJ | 1.000000e+13 aJ |
| 20 uJ | 2.000000e+13 aJ |
| 50 uJ | 5.000000e+13 aJ |
| 100 uJ | 1.000000e+14 aJ |
| 500 uJ | 5.000000e+14 aJ |
| 1000 uJ | 1.000000e+15 aJ |
Related conversions
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How the formula works
Both microjoule and attojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in microjoules by 1000000000000 to get attojoules. To reverse the conversion, multiply a attojoule value by 1.000000000e-12 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 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 microjoules to attojoules?
Multiply the microjoule value by 1000000000000 to get the equivalent in attojoules. For example, 5 uJ × 1000000000000 = 5.000000e+12 aJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1000000000000 is an exact, non-rounded value.
Can I convert attojoules back to microjoules?
Yes. Divide the attojoule value by 1000000000000, or multiply it by 1.000000000e-12, to get microjoules.
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About converting microjoules to attojoules
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 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 microjoules 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.