A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
Megajoules to Microjoules
Convert Megajoule (MJ) to Microjoule (uJ) instantly with an exact formula, conversion table, and FAQ.
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Convert megajoules (MJ) 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 = MJ × 1000000000000
Results update instantly for Megajoules to Microjoules conversions.
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Formula
uJ = MJ × 1000000000000
MJ = uJ × 1.000000000e-12
Conversion table
| 1 MJ | 1.000000e+12 uJ |
| 5 MJ | 5.000000e+12 uJ |
| 10 MJ | 1.000000e+13 uJ |
| 20 MJ | 2.000000e+13 uJ |
| 50 MJ | 5.000000e+13 uJ |
| 100 MJ | 1.000000e+14 uJ |
| 500 MJ | 5.000000e+14 uJ |
| 1000 MJ | 1.000000e+15 uJ |
Related conversions
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How the formula works
Both megajoule and microjoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in megajoules by 1000000000000 to get microjoules. To reverse the conversion, multiply a microjoule value by 1.000000000e-12 to get back to megajoules.
Frequently asked questions
What is Megajoule (MJ)?
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
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 megajoules to microjoules?
Multiply the megajoule value by 1000000000000 to get the equivalent in microjoules. For example, 5 MJ × 1000000000000 = 5.000000e+12 uJ.
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 microjoules back to megajoules?
Yes. Divide the microjoule value by 1000000000000, or multiply it by 1.000000000e-12, to get megajoules.
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About converting megajoules to microjoules
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix. 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 megajoules 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.