A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
Megajoules to Ergs
Convert Megajoule (MJ) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
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Convert megajoules (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 × 10000000000000
Results update instantly for Megajoules to Ergs conversions.
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Formula
erg = MJ × 10000000000000
MJ = erg × 1.000000000e-13
Conversion table
| 1 MJ | 1.000000e+13 erg |
| 5 MJ | 5.000000e+13 erg |
| 10 MJ | 1.000000e+14 erg |
| 20 MJ | 2.000000e+14 erg |
| 50 MJ | 5.000000e+14 erg |
| 100 MJ | 1.000000e+15 erg |
| 500 MJ | 5.000000e+15 erg |
| 1000 MJ | 1.000000e+16 erg |
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How the formula works
Both megajoule and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in megajoules by 10000000000000 to get ergs. To reverse the conversion, multiply a erg value by 1.000000000e-13 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 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 megajoules to ergs?
Multiply the megajoule value by 10000000000000 to get the equivalent in ergs. For example, 5 MJ × 10000000000000 = 5.000000e+13 erg.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 10000000000000 is an exact, non-rounded value.
Can I convert ergs back to megajoules?
Yes. Divide the erg value by 10000000000000, or multiply it by 1.000000000e-13, to get megajoules.
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About converting megajoules to ergs
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega 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 megajoules 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.