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 Joules
Convert Microjoule (uJ) to Joule (J) instantly with an exact formula, conversion table, and FAQ.
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Convert microjoules (uJ) to joules (J) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
J = uJ × 0.000001
Results update instantly for Microjoules to Joules conversions.
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Formula
J = uJ × 0.000001
uJ = J × 1000000
Conversion table
| 1 uJ | 0.000001 J |
| 5 uJ | 0.000005 J |
| 10 uJ | 0.000010 J |
| 20 uJ | 0.000020 J |
| 50 uJ | 0.000050 J |
| 100 uJ | 0.000100 J |
| 500 uJ | 0.000500 J |
| 1000 uJ | 0.001000 J |
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How the formula works
Both microjoule and joule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in microjoules by 0.000001 to get joules. To reverse the conversion, multiply a joule value by 1000000 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 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.
How do I convert microjoules to joules?
Multiply the microjoule value by 0.000001 to get the equivalent in joules. For example, 5 uJ × 0.000001 = 0.000005 J.
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 joules back to microjoules?
Yes. Divide the joule value by 0.000001, or multiply it by 1000000, to get microjoules.
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About converting microjoules to joules
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. 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.
Use this calculator to move between microjoules and joules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.