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 Terajoules
Convert Femtojoule (fJ) to Terajoule (TJ) instantly with an exact formula, conversion table, and FAQ.
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Convert femtojoules (fJ) to terajoules (TJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix.
TJ = fJ × 1.000000000e-27
Results update instantly for Femtojoules to Terajoules conversions.
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Formula
TJ = fJ × 1.000000000e-27
fJ = TJ × 1.000000000e+27
Conversion table
| 1 fJ | 1.000000e-27 TJ |
| 5 fJ | 5.000000e-27 TJ |
| 10 fJ | 1.000000e-26 TJ |
| 20 fJ | 2.000000e-26 TJ |
| 50 fJ | 5.000000e-26 TJ |
| 100 fJ | 1.000000e-25 TJ |
| 500 fJ | 5.000000e-25 TJ |
| 1000 fJ | 1.000000e-24 TJ |
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How the formula works
Both femtojoule and terajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in femtojoules by 1.000000000e-27 to get terajoules. To reverse the conversion, multiply a terajoule value by 1.000000000e+27 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 Terajoule (TJ)?
A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix.
How do I convert femtojoules to terajoules?
Multiply the femtojoule value by 1.000000000e-27 to get the equivalent in terajoules. For example, 5 fJ × 1.000000000e-27 = 5.000000e-27 TJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-27 is an exact, non-rounded value.
Can I convert terajoules back to femtojoules?
Yes. Divide the terajoule value by 1.000000000e-27, or multiply it by 1.000000000e+27, to get femtojoules.
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About converting femtojoules to terajoules
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 terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix.
Use this calculator to move between femtojoules and terajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.