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 Quettajoules
Convert Calorie (cal) to Quettajoule (QJ) instantly with an exact formula, conversion table, and FAQ.
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Convert calories (cal) to quettajoules (QJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix.
QJ = cal × 4.184000000e-30
Results update instantly for Calories to Quettajoules conversions.
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Formula
QJ = cal × 4.184000000e-30
cal = QJ × 2.390057361e+29
Conversion table
| 1 cal | 4.184000e-30 QJ |
| 5 cal | 2.092000e-29 QJ |
| 10 cal | 4.184000e-29 QJ |
| 20 cal | 8.368000e-29 QJ |
| 50 cal | 2.092000e-28 QJ |
| 100 cal | 4.184000e-28 QJ |
| 500 cal | 2.092000e-27 QJ |
| 1000 cal | 4.184000e-27 QJ |
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How the formula works
Both calorie and quettajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in calories by 4.184000000e-30 to get quettajoules. To reverse the conversion, multiply a quettajoule value by 2.390057361e+29 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 Quettajoule (QJ)?
A quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix.
How do I convert calories to quettajoules?
Multiply the calorie value by 4.184000000e-30 to get the equivalent in quettajoules. For example, 5 cal × 4.184000000e-30 = 2.092000e-29 QJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 4.184000000e-30 is an exact, non-rounded value.
Can I convert quettajoules back to calories?
Yes. Divide the quettajoule value by 4.184000000e-30, or multiply it by 2.390057361e+29, to get calories.
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About converting calories to quettajoules
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 quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix.
Use this calculator to move between calories and quettajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.