A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
Millijoules to Terajoules
Convert Millijoule (mJ) to Terajoule (TJ) instantly with an exact formula, conversion table, and FAQ.
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Convert millijoules (mJ) 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 = mJ × 1.000000000e-15
Results update instantly for Millijoules to Terajoules conversions.
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Formula
TJ = mJ × 1.000000000e-15
mJ = TJ × 1.000000000e+15
Conversion table
| 1 mJ | 1.000000e-15 TJ |
| 5 mJ | 5.000000e-15 TJ |
| 10 mJ | 1.000000e-14 TJ |
| 20 mJ | 2.000000e-14 TJ |
| 50 mJ | 5.000000e-14 TJ |
| 100 mJ | 1.000000e-13 TJ |
| 500 mJ | 5.000000e-13 TJ |
| 1000 mJ | 1.000000e-12 TJ |
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How the formula works
Both millijoule and terajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in millijoules by 1.000000000e-15 to get terajoules. To reverse the conversion, multiply a terajoule value by 1.000000000e+15 to get back to millijoules.
Frequently asked questions
What is Millijoule (mJ)?
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli 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 millijoules to terajoules?
Multiply the millijoule value by 1.000000000e-15 to get the equivalent in terajoules. For example, 5 mJ × 1.000000000e-15 = 5.000000e-15 TJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-15 is an exact, non-rounded value.
Can I convert terajoules back to millijoules?
Yes. Divide the terajoule value by 1.000000000e-15, or multiply it by 1.000000000e+15, to get millijoules.
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About converting millijoules to terajoules
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli 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 millijoules 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.