A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca prefix.
Decajoules to Millijoules
Convert Decajoule (daJ) to Millijoule (mJ) instantly with an exact formula, conversion table, and FAQ.
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Convert decajoules (daJ) 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 = daJ × 10000
Results update instantly for Decajoules to Millijoules conversions.
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Formula
mJ = daJ × 10000
daJ = mJ × 0.0001
Conversion table
| 1 daJ | 10000 mJ |
| 5 daJ | 50000 mJ |
| 10 daJ | 100000 mJ |
| 20 daJ | 200000 mJ |
| 50 daJ | 500000 mJ |
| 100 daJ | 1.000000e+06 mJ |
| 500 daJ | 5.000000e+06 mJ |
| 1000 daJ | 1.000000e+07 mJ |
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How the formula works
Both decajoule and millijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in decajoules by 10000 to get millijoules. To reverse the conversion, multiply a millijoule value by 0.0001 to get back to decajoules.
Frequently asked questions
What is Decajoule (daJ)?
A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca 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 decajoules to millijoules?
Multiply the decajoule value by 10000 to get the equivalent in millijoules. For example, 5 daJ × 10000 = 50000 mJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 10000 is an exact, non-rounded value.
Can I convert millijoules back to decajoules?
Yes. Divide the millijoule value by 10000, or multiply it by 0.0001, to get decajoules.
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About converting decajoules to millijoules
A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca 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 decajoules 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.