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.
Millijoules to Ergs
Convert Millijoule (mJ) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
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Convert millijoules (mJ) to ergs (erg) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
erg = mJ × 10000
Results update instantly for Millijoules to Ergs conversions.
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Formula
erg = mJ × 10000
mJ = erg × 0.0001
Conversion table
| 1 mJ | 10000 erg |
| 5 mJ | 50000 erg |
| 10 mJ | 100000 erg |
| 20 mJ | 200000 erg |
| 50 mJ | 500000 erg |
| 100 mJ | 1.000000e+06 erg |
| 500 mJ | 5.000000e+06 erg |
| 1000 mJ | 1.000000e+07 erg |
Related conversions
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How the formula works
Both millijoule and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in millijoules by 10000 to get ergs. To reverse the conversion, multiply a erg value by 0.0001 to get back to millijoules.
Frequently asked questions
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.
What is Erg (erg)?
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
How do I convert millijoules to ergs?
Multiply the millijoule value by 10000 to get the equivalent in ergs. For example, 5 mJ × 10000 = 50000 erg.
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 ergs back to millijoules?
Yes. Divide the erg value by 10000, or multiply it by 0.0001, to get millijoules.
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About converting millijoules to ergs
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. An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Use this calculator to move between millijoules and ergs accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.