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 Quettajoules
Convert Femtojoule (fJ) to Quettajoule (QJ) instantly with an exact formula, conversion table, and FAQ.
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Convert femtojoules (fJ) to quettajoules (QJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix.
QJ = fJ × 1.000000000e-45
Results update instantly for Femtojoules to Quettajoules conversions.
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Formula
QJ = fJ × 1.000000000e-45
fJ = QJ × 1.000000000e+45
Conversion table
| 1 fJ | 1.000000e-45 QJ |
| 5 fJ | 5.000000e-45 QJ |
| 10 fJ | 1.000000e-44 QJ |
| 20 fJ | 2.000000e-44 QJ |
| 50 fJ | 5.000000e-44 QJ |
| 100 fJ | 1.000000e-43 QJ |
| 500 fJ | 5.000000e-43 QJ |
| 1000 fJ | 1.000000e-42 QJ |
Related conversions
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How the formula works
Both femtojoule and quettajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in femtojoules by 1.000000000e-45 to get quettajoules. To reverse the conversion, multiply a quettajoule value by 1.000000000e+45 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 Quettajoule (QJ)?
A quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix.
How do I convert femtojoules to quettajoules?
Multiply the femtojoule value by 1.000000000e-45 to get the equivalent in quettajoules. For example, 5 fJ × 1.000000000e-45 = 5.000000e-45 QJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-45 is an exact, non-rounded value.
Can I convert quettajoules back to femtojoules?
Yes. Divide the quettajoule value by 1.000000000e-45, or multiply it by 1.000000000e+45, to get femtojoules.
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About converting femtojoules to quettajoules
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 quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix.
Use this calculator to move between femtojoules and quettajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.