The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
Joules to Microjoules
Convert Joule (J) to Microjoule (uJ) instantly with an exact formula, conversion table, and FAQ.
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Convert joules (J) to microjoules (uJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
uJ = J × 1000000
Results update instantly for Joules to Microjoules conversions.
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Formula
uJ = J × 1000000
J = uJ × 0.000001
Conversion table
| 1 J | 1.000000e+06 uJ |
| 5 J | 5.000000e+06 uJ |
| 10 J | 1.000000e+07 uJ |
| 20 J | 2.000000e+07 uJ |
| 50 J | 5.000000e+07 uJ |
| 100 J | 1.000000e+08 uJ |
| 500 J | 5.000000e+08 uJ |
| 1000 J | 1.000000e+09 uJ |
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How the formula works
Both joule and microjoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in joules by 1000000 to get microjoules. To reverse the conversion, multiply a microjoule value by 0.000001 to get back to joules.
Frequently asked questions
What is Joule (J)?
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
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.
How do I convert joules to microjoules?
Multiply the joule value by 1000000 to get the equivalent in microjoules. For example, 5 J × 1000000 = 5.000000e+06 uJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1000000 is an exact, non-rounded value.
Can I convert microjoules back to joules?
Yes. Divide the microjoule value by 1000000, or multiply it by 0.000001, to get joules.
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About converting joules to microjoules
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter. 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.
Use this calculator to move between joules and microjoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.