A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
Calories to Terajoules
Convert Calorie (cal) to Terajoule (TJ) instantly with an exact formula, conversion table, and FAQ.
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Convert calories (cal) 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 = cal × 4.184000000e-12
Results update instantly for Calories to Terajoules conversions.
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Formula
TJ = cal × 4.184000000e-12
cal = TJ × 239005736138
Conversion table
| 1 cal | 4.184000e-12 TJ |
| 5 cal | 2.092000e-11 TJ |
| 10 cal | 4.184000e-11 TJ |
| 20 cal | 8.368000e-11 TJ |
| 50 cal | 2.092000e-10 TJ |
| 100 cal | 4.184000e-10 TJ |
| 500 cal | 2.092000e-09 TJ |
| 1000 cal | 4.184000e-09 TJ |
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How the formula works
Both calorie and terajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in calories by 4.184000000e-12 to get terajoules. To reverse the conversion, multiply a terajoule value by 239005736138 to get back to calories.
Frequently asked questions
What is Calorie (cal)?
A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
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 calories to terajoules?
Multiply the calorie value by 4.184000000e-12 to get the equivalent in terajoules. For example, 5 cal × 4.184000000e-12 = 2.092000e-11 TJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 4.184000000e-12 is an exact, non-rounded value.
Can I convert terajoules back to calories?
Yes. Divide the terajoule value by 4.184000000e-12, or multiply it by 239005736138, to get calories.
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About converting calories to terajoules
A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C. 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 calories 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.