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 Kilocalories
Convert Centijoule (cJ) to Kilocalorie (kcal) instantly with an exact formula, conversion table, and FAQ.
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Convert centijoules (cJ) to kilocalories (kcal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
kcal = cJ × 0.000002390057361
Results update instantly for Centijoules to Kilocalories conversions.
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Formula
kcal = cJ × 0.000002390057361
cJ = kcal × 418400
Conversion table
| 1 cJ | 0.000002 kcal |
| 5 cJ | 0.000012 kcal |
| 10 cJ | 0.000024 kcal |
| 20 cJ | 0.000048 kcal |
| 50 cJ | 0.000120 kcal |
| 100 cJ | 0.000239 kcal |
| 500 cJ | 0.001195 kcal |
| 1000 cJ | 0.002390 kcal |
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How the formula works
Both centijoule and kilocalorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in centijoules by 0.000002390057361 to get kilocalories. To reverse the conversion, multiply a kilocalorie value by 418400 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 Kilocalorie (kcal)?
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
How do I convert centijoules to kilocalories?
Multiply the centijoule value by 0.000002390057361 to get the equivalent in kilocalories. For example, 5 cJ × 0.000002390057361 = 0.000012 kcal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.000002390057361 is an exact, non-rounded value.
Can I convert kilocalories back to centijoules?
Yes. Divide the kilocalorie value by 0.000002390057361, or multiply it by 418400, to get centijoules.
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About converting centijoules to kilocalories
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 kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
Use this calculator to move between centijoules and kilocalories accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.