An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Ergs to Ronnajoules
Convert Erg (erg) to Ronnajoule (RJ) instantly with an exact formula, conversion table, and FAQ.
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Convert ergs (erg) to ronnajoules (RJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A ronnajoule (RJ) is a metric-prefixed unit of energy equal to 1027 joules, using the SI ronna prefix.
RJ = erg × 1.000000000e-34
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Formula
RJ = erg × 1.000000000e-34
erg = RJ × 1.000000000e+34
Conversion table
| 1 erg | 1.000000e-34 RJ |
| 5 erg | 5.000000e-34 RJ |
| 10 erg | 1.000000e-33 RJ |
| 20 erg | 2.000000e-33 RJ |
| 50 erg | 5.000000e-33 RJ |
| 100 erg | 1.000000e-32 RJ |
| 500 erg | 5.000000e-32 RJ |
| 1000 erg | 1.000000e-31 RJ |
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How the formula works
Both erg and ronnajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in ergs by 1.000000000e-34 to get ronnajoules. To reverse the conversion, multiply a ronnajoule value by 1.000000000e+34 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 Ronnajoule (RJ)?
A ronnajoule (RJ) is a metric-prefixed unit of energy equal to 1027 joules, using the SI ronna prefix.
How do I convert ergs to ronnajoules?
Multiply the erg value by 1.000000000e-34 to get the equivalent in ronnajoules. For example, 5 erg × 1.000000000e-34 = 5.000000e-34 RJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-34 is an exact, non-rounded value.
Can I convert ronnajoules back to ergs?
Yes. Divide the ronnajoule value by 1.000000000e-34, or multiply it by 1.000000000e+34, to get ergs.
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About converting ergs to ronnajoules
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule. A ronnajoule (RJ) is a metric-prefixed unit of energy equal to 1027 joules, using the SI ronna prefix.
Use this calculator to move between ergs and ronnajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.