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 Megajoules
Convert Microjoule (uJ) to Megajoule (MJ) instantly with an exact formula, conversion table, and FAQ.
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Convert microjoules (uJ) to megajoules (MJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
MJ = uJ × 1.000000000e-12
Results update instantly for Microjoules to Megajoules conversions.
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Formula
MJ = uJ × 1.000000000e-12
uJ = MJ × 1000000000000
Conversion table
| 1 uJ | 1.000000e-12 MJ |
| 5 uJ | 5.000000e-12 MJ |
| 10 uJ | 1.000000e-11 MJ |
| 20 uJ | 2.000000e-11 MJ |
| 50 uJ | 5.000000e-11 MJ |
| 100 uJ | 1.000000e-10 MJ |
| 500 uJ | 5.000000e-10 MJ |
| 1000 uJ | 1.000000e-09 MJ |
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How the formula works
Both microjoule and megajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in microjoules by 1.000000000e-12 to get megajoules. To reverse the conversion, multiply a megajoule value by 1000000000000 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 Megajoule (MJ)?
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
How do I convert microjoules to megajoules?
Multiply the microjoule value by 1.000000000e-12 to get the equivalent in megajoules. For example, 5 uJ × 1.000000000e-12 = 5.000000e-12 MJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-12 is an exact, non-rounded value.
Can I convert megajoules back to microjoules?
Yes. Divide the megajoule value by 1.000000000e-12, or multiply it by 1000000000000, to get microjoules.
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About converting microjoules to megajoules
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 megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
Use this calculator to move between microjoules and megajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.