An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Ergs to Nanojoules
Convert Erg (erg) to Nanojoule (nJ) instantly with an exact formula, conversion table, and FAQ.
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Convert ergs (erg) to nanojoules (nJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
nJ = erg × 100
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Formula
nJ = erg × 100
erg = nJ × 0.01
Conversion table
| 1 erg | 100 nJ |
| 5 erg | 500 nJ |
| 10 erg | 1000 nJ |
| 20 erg | 2000 nJ |
| 50 erg | 5000 nJ |
| 100 erg | 10000 nJ |
| 500 erg | 50000 nJ |
| 1000 erg | 100000 nJ |
Related conversions
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How the formula works
Both erg and nanojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in ergs by 100 to get nanojoules. To reverse the conversion, multiply a nanojoule value by 0.01 to get back to ergs.
Frequently asked questions
What is Erg (erg)?
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
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.
How do I convert ergs to nanojoules?
Multiply the erg value by 100 to get the equivalent in nanojoules. For example, 5 erg × 100 = 500 nJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 100 is an exact, non-rounded value.
Can I convert nanojoules back to ergs?
Yes. Divide the nanojoule value by 100, or multiply it by 0.01, to get ergs.
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About converting ergs to nanojoules
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule. 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.
Use this calculator to move between ergs and nanojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.