An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Ergs to Hectojoules
Convert Erg (erg) to Hectojoule (hJ) instantly with an exact formula, conversion table, and FAQ.
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Convert ergs (erg) to hectojoules (hJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
hJ = erg × 1.000000000e-09
Results update instantly for Ergs to Hectojoules conversions.
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Formula
hJ = erg × 1.000000000e-09
erg = hJ × 1000000000
Conversion table
| 1 erg | 1.000000e-09 hJ |
| 5 erg | 5.000000e-09 hJ |
| 10 erg | 1.000000e-08 hJ |
| 20 erg | 2.000000e-08 hJ |
| 50 erg | 5.000000e-08 hJ |
| 100 erg | 1.000000e-07 hJ |
| 500 erg | 5.000000e-07 hJ |
| 1000 erg | 0.000001 hJ |
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How the formula works
Both erg and hectojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in ergs by 1.000000000e-09 to get hectojoules. To reverse the conversion, multiply a hectojoule value by 1000000000 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 Hectojoule (hJ)?
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
How do I convert ergs to hectojoules?
Multiply the erg value by 1.000000000e-09 to get the equivalent in hectojoules. For example, 5 erg × 1.000000000e-09 = 5.000000e-09 hJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-09 is an exact, non-rounded value.
Can I convert hectojoules back to ergs?
Yes. Divide the hectojoule value by 1.000000000e-09, or multiply it by 1000000000, to get ergs.
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About converting ergs to hectojoules
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule. A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
Use this calculator to move between ergs and hectojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.