A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix.
Centijoules to Calories
Convert Centijoule (cJ) to Calorie (cal) instantly with an exact formula, conversion table, and FAQ.
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Convert centijoules (cJ) to calories (cal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
cal = cJ × 0.002390057361
Results update instantly for Centijoules to Calories conversions.
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Formula
cal = cJ × 0.002390057361
cJ = cal × 418.4
Conversion table
| 1 cJ | 0.002390 cal |
| 5 cJ | 0.011950 cal |
| 10 cJ | 0.023901 cal |
| 20 cJ | 0.047801 cal |
| 50 cJ | 0.119503 cal |
| 100 cJ | 0.239006 cal |
| 500 cJ | 1.195029 cal |
| 1000 cJ | 2.390057 cal |
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How the formula works
Both centijoule and calorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in centijoules by 0.002390057361 to get calories. To reverse the conversion, multiply a calorie value by 418.4 to get back to centijoules.
Frequently asked questions
What is Centijoule (cJ)?
A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix.
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.
How do I convert centijoules to calories?
Multiply the centijoule value by 0.002390057361 to get the equivalent in calories. For example, 5 cJ × 0.002390057361 = 0.011950 cal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.002390057361 is an exact, non-rounded value.
Can I convert calories back to centijoules?
Yes. Divide the calorie value by 0.002390057361, or multiply it by 418.4, to get centijoules.
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About converting centijoules to calories
A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix. 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.
Use this calculator to move between centijoules and calories accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.