An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Ergs to Gigajoules
Convert Erg (erg) to Gigajoule (GJ) instantly with an exact formula, conversion table, and FAQ.
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Convert ergs (erg) to gigajoules (GJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
GJ = erg × 1.000000000e-16
Results update instantly for Ergs to Gigajoules conversions.
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Formula
GJ = erg × 1.000000000e-16
erg = GJ × 1.000000000e+16
Conversion table
| 1 erg | 1.000000e-16 GJ |
| 5 erg | 5.000000e-16 GJ |
| 10 erg | 1.000000e-15 GJ |
| 20 erg | 2.000000e-15 GJ |
| 50 erg | 5.000000e-15 GJ |
| 100 erg | 1.000000e-14 GJ |
| 500 erg | 5.000000e-14 GJ |
| 1000 erg | 1.000000e-13 GJ |
Related conversions
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How the formula works
Both erg and gigajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in ergs by 1.000000000e-16 to get gigajoules. To reverse the conversion, multiply a gigajoule value by 1.000000000e+16 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 Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
How do I convert ergs to gigajoules?
Multiply the erg value by 1.000000000e-16 to get the equivalent in gigajoules. For example, 5 erg × 1.000000000e-16 = 5.000000e-16 GJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-16 is an exact, non-rounded value.
Can I convert gigajoules back to ergs?
Yes. Divide the gigajoule value by 1.000000000e-16, or multiply it by 1.000000000e+16, to get ergs.
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About converting ergs to gigajoules
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule. A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Use this calculator to move between ergs and gigajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.