A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano prefix.
Nanojoules to Millijoules
Convert Nanojoule (nJ) to Millijoule (mJ) instantly with an exact formula, conversion table, and FAQ.
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Convert nanojoules (nJ) to millijoules (mJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
mJ = nJ × 0.000001
Results update instantly for Nanojoules to Millijoules conversions.
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Formula
mJ = nJ × 0.000001
nJ = mJ × 1000000
Conversion table
| 1 nJ | 0.000001 mJ |
| 5 nJ | 0.000005 mJ |
| 10 nJ | 0.000010 mJ |
| 20 nJ | 0.000020 mJ |
| 50 nJ | 0.000050 mJ |
| 100 nJ | 0.000100 mJ |
| 500 nJ | 0.000500 mJ |
| 1000 nJ | 0.001000 mJ |
Related conversions
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How the formula works
Both nanojoule and millijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in nanojoules by 0.000001 to get millijoules. To reverse the conversion, multiply a millijoule value by 1000000 to get back to nanojoules.
Frequently asked questions
What is Nanojoule (nJ)?
A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano prefix.
What is Millijoule (mJ)?
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
How do I convert nanojoules to millijoules?
Multiply the nanojoule value by 0.000001 to get the equivalent in millijoules. For example, 5 nJ × 0.000001 = 0.000005 mJ.
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 millijoules back to nanojoules?
Yes. Divide the millijoule value by 0.000001, or multiply it by 1000000, to get nanojoules.
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About converting nanojoules to millijoules
A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano prefix. A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
Use this calculator to move between nanojoules and millijoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.