A zeptojoule (zJ) is a metric-prefixed unit of energy equal to 10-21 joules, a fraction of a single joule, using the SI zepto prefix.
Zeptojoules to Ergs
Convert Zeptojoule (zJ) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
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Convert zeptojoules (zJ) 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 = zJ × 1.000000000e-14
Results update instantly for Zeptojoules to Ergs conversions.
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Formula
erg = zJ × 1.000000000e-14
zJ = erg × 100000000000000
Conversion table
| 1 zJ | 1.000000e-14 erg |
| 5 zJ | 5.000000e-14 erg |
| 10 zJ | 1.000000e-13 erg |
| 20 zJ | 2.000000e-13 erg |
| 50 zJ | 5.000000e-13 erg |
| 100 zJ | 1.000000e-12 erg |
| 500 zJ | 5.000000e-12 erg |
| 1000 zJ | 1.000000e-11 erg |
Related conversions
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How the formula works
Both zeptojoule and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in zeptojoules by 1.000000000e-14 to get ergs. To reverse the conversion, multiply a erg value by 100000000000000 to get back to zeptojoules.
Frequently asked questions
What is Zeptojoule (zJ)?
A zeptojoule (zJ) is a metric-prefixed unit of energy equal to 10-21 joules, a fraction of a single joule, using the SI zepto 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 zeptojoules to ergs?
Multiply the zeptojoule value by 1.000000000e-14 to get the equivalent in ergs. For example, 5 zJ × 1.000000000e-14 = 5.000000e-14 erg.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-14 is an exact, non-rounded value.
Can I convert ergs back to zeptojoules?
Yes. Divide the erg value by 1.000000000e-14, or multiply it by 100000000000000, to get zeptojoules.
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About converting zeptojoules to ergs
A zeptojoule (zJ) is a metric-prefixed unit of energy equal to 10-21 joules, a fraction of a single joule, using the SI zepto 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 zeptojoules 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.