A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix.
Terajoules to Gigajoules
Convert Terajoule (TJ) to Gigajoule (GJ) instantly with an exact formula, conversion table, and FAQ.
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Convert terajoules (TJ) to gigajoules (GJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
GJ = TJ × 1000
Results update instantly for Terajoules to Gigajoules conversions.
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Formula
GJ = TJ × 1000
TJ = GJ × 0.001
Conversion table
| 1 TJ | 1000 GJ |
| 5 TJ | 5000 GJ |
| 10 TJ | 10000 GJ |
| 20 TJ | 20000 GJ |
| 50 TJ | 50000 GJ |
| 100 TJ | 100000 GJ |
| 500 TJ | 500000 GJ |
| 1000 TJ | 1.000000e+06 GJ |
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How the formula works
Both terajoule and gigajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in terajoules by 1000 to get gigajoules. To reverse the conversion, multiply a gigajoule value by 0.001 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 Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
How do I convert terajoules to gigajoules?
Multiply the terajoule value by 1000 to get the equivalent in gigajoules. For example, 5 TJ × 1000 = 5000 GJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1000 is an exact, non-rounded value.
Can I convert gigajoules back to terajoules?
Yes. Divide the gigajoule value by 1000, or multiply it by 0.001, to get terajoules.
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About converting terajoules to gigajoules
A terajoule (TJ) is a metric-prefixed unit of energy equal to 1012 joules, using the SI tera prefix. A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Use this calculator to move between terajoules and gigajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.