A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Gigajoules to Ergs
Convert Gigajoule (GJ) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
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Convert gigajoules (GJ) 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 = GJ × 1.000000000e+16
Results update instantly for Gigajoules to Ergs conversions.
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Formula
erg = GJ × 1.000000000e+16
GJ = erg × 1.000000000e-16
Conversion table
| 1 GJ | 1.000000e+16 erg |
| 5 GJ | 5.000000e+16 erg |
| 10 GJ | 1.000000e+17 erg |
| 20 GJ | 2.000000e+17 erg |
| 50 GJ | 5.000000e+17 erg |
| 100 GJ | 1.000000e+18 erg |
| 500 GJ | 5.000000e+18 erg |
| 1000 GJ | 1.000000e+19 erg |
Related conversions
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How the formula works
Both gigajoule and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigajoules by 1.000000000e+16 to get ergs. To reverse the conversion, multiply a erg value by 1.000000000e-16 to get back to gigajoules.
Frequently asked questions
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga 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 gigajoules to ergs?
Multiply the gigajoule value by 1.000000000e+16 to get the equivalent in ergs. For example, 5 GJ × 1.000000000e+16 = 5.000000e+16 erg.
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 ergs back to gigajoules?
Yes. Divide the erg value by 1.000000000e+16, or multiply it by 1.000000000e-16, to get gigajoules.
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About converting gigajoules to ergs
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga 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 gigajoules 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.