A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix.
Terajoules to Femtojoules
Convert Terajoule (TJ) to Femtojoule (fJ) instantly with an exact formula, conversion table, and FAQ.
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Convert terajoules (TJ) to femtojoules (fJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
fJ = TJ × 1.000000000e+27
Results update instantly for Terajoules to Femtojoules conversions.
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Formula
fJ = TJ × 1.000000000e+27
TJ = fJ × 1.000000000e-27
Conversion table
| 1 TJ | 1.000000e+27 fJ |
| 5 TJ | 5.000000e+27 fJ |
| 10 TJ | 1.000000e+28 fJ |
| 20 TJ | 2.000000e+28 fJ |
| 50 TJ | 5.000000e+28 fJ |
| 100 TJ | 1.000000e+29 fJ |
| 500 TJ | 5.000000e+29 fJ |
| 1000 TJ | 1.000000e+30 fJ |
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How the formula works
Both terajoule and femtojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in terajoules by 1.000000000e+27 to get femtojoules. To reverse the conversion, multiply a femtojoule value by 1.000000000e-27 to get back to terajoules.
Frequently asked questions
What is Terajoule (TJ)?
A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix.
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.
How do I convert terajoules to femtojoules?
Multiply the terajoule value by 1.000000000e+27 to get the equivalent in femtojoules. For example, 5 TJ × 1.000000000e+27 = 5.000000e+27 fJ.
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 femtojoules back to terajoules?
Yes. Divide the femtojoule value by 1.000000000e+27, or multiply it by 1.000000000e-27, to get terajoules.
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About converting terajoules to femtojoules
A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix. 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.
Use this calculator to move between terajoules and femtojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.