A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix.
Attojoules to Hectojoules
Convert Attojoule (aJ) to Hectojoule (hJ) instantly with an exact formula, conversion table, and FAQ.
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Convert attojoules (aJ) 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 = aJ × 1.000000000e-20
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Formula
hJ = aJ × 1.000000000e-20
aJ = hJ × 1.000000000e+20
Conversion table
| 1 aJ | 1.000000e-20 hJ |
| 5 aJ | 5.000000e-20 hJ |
| 10 aJ | 1.000000e-19 hJ |
| 20 aJ | 2.000000e-19 hJ |
| 50 aJ | 5.000000e-19 hJ |
| 100 aJ | 1.000000e-18 hJ |
| 500 aJ | 5.000000e-18 hJ |
| 1000 aJ | 1.000000e-17 hJ |
Related conversions
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How the formula works
Both attojoule and hectojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in attojoules by 1.000000000e-20 to get hectojoules. To reverse the conversion, multiply a hectojoule value by 1.000000000e+20 to get back to attojoules.
Frequently asked questions
What is Attojoule (aJ)?
A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix.
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 attojoules to hectojoules?
Multiply the attojoule value by 1.000000000e-20 to get the equivalent in hectojoules. For example, 5 aJ × 1.000000000e-20 = 5.000000e-20 hJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-20 is an exact, non-rounded value.
Can I convert hectojoules back to attojoules?
Yes. Divide the hectojoule value by 1.000000000e-20, or multiply it by 1.000000000e+20, to get attojoules.
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About converting attojoules to hectojoules
A attojoule (aJ) is a metric-prefixed unit of energy equal to 10-18 joules, a fraction of a single joule, using the SI atto prefix. 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 attojoules 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.