A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
Femtojoules to Hectojoules
Convert Femtojoule (fJ) to Hectojoule (hJ) instantly with an exact formula, conversion table, and FAQ.
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Convert femtojoules (fJ) 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 = fJ × 1.000000000e-17
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Formula
hJ = fJ × 1.000000000e-17
fJ = hJ × 1.000000000e+17
Conversion table
| 1 fJ | 1.000000e-17 hJ |
| 5 fJ | 5.000000e-17 hJ |
| 10 fJ | 1.000000e-16 hJ |
| 20 fJ | 2.000000e-16 hJ |
| 50 fJ | 5.000000e-16 hJ |
| 100 fJ | 1.000000e-15 hJ |
| 500 fJ | 5.000000e-15 hJ |
| 1000 fJ | 1.000000e-14 hJ |
Related conversions
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How the formula works
Both femtojoule and hectojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in femtojoules by 1.000000000e-17 to get hectojoules. To reverse the conversion, multiply a hectojoule value by 1.000000000e+17 to get back to femtojoules.
Frequently asked questions
What is Femtojoule (fJ)?
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto 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 femtojoules to hectojoules?
Multiply the femtojoule value by 1.000000000e-17 to get the equivalent in hectojoules. For example, 5 fJ × 1.000000000e-17 = 5.000000e-17 hJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-17 is an exact, non-rounded value.
Can I convert hectojoules back to femtojoules?
Yes. Divide the hectojoule value by 1.000000000e-17, or multiply it by 1.000000000e+17, to get femtojoules.
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About converting femtojoules to hectojoules
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto 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 femtojoules 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.