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 Zettajoules
Convert Femtojoule (fJ) to Zettajoule (ZJ) instantly with an exact formula, conversion table, and FAQ.
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Convert femtojoules (fJ) to zettajoules (ZJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
ZJ = fJ × 1.000000000e-36
Results update instantly for Femtojoules to Zettajoules conversions.
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Formula
ZJ = fJ × 1.000000000e-36
fJ = ZJ × 1.000000000e+36
Conversion table
| 1 fJ | 1.000000e-36 ZJ |
| 5 fJ | 5.000000e-36 ZJ |
| 10 fJ | 1.000000e-35 ZJ |
| 20 fJ | 2.000000e-35 ZJ |
| 50 fJ | 5.000000e-35 ZJ |
| 100 fJ | 1.000000e-34 ZJ |
| 500 fJ | 5.000000e-34 ZJ |
| 1000 fJ | 1.000000e-33 ZJ |
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How the formula works
Both femtojoule and zettajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in femtojoules by 1.000000000e-36 to get zettajoules. To reverse the conversion, multiply a zettajoule value by 1.000000000e+36 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 Zettajoule (ZJ)?
A zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
How do I convert femtojoules to zettajoules?
Multiply the femtojoule value by 1.000000000e-36 to get the equivalent in zettajoules. For example, 5 fJ × 1.000000000e-36 = 5.000000e-36 ZJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-36 is an exact, non-rounded value.
Can I convert zettajoules back to femtojoules?
Yes. Divide the zettajoule value by 1.000000000e-36, or multiply it by 1.000000000e+36, to get femtojoules.
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About converting femtojoules to zettajoules
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 zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
Use this calculator to move between femtojoules and zettajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.