A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
Kilocalories to Decijoules
Convert Kilocalorie (kcal) to Decijoule (dJ) instantly with an exact formula, conversion table, and FAQ.
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Convert kilocalories (kcal) to decijoules (dJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A decijoule (dJ) is a metric-prefixed unit of energy equal to 10-1 joules, a fraction of a single joule, using the SI deci prefix.
dJ = kcal × 41840
Results update instantly for Kilocalories to Decijoules conversions.
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Formula
dJ = kcal × 41840
kcal = dJ × 0.00002390057361
Conversion table
| 1 kcal | 41840 dJ |
| 5 kcal | 209200 dJ |
| 10 kcal | 418400 dJ |
| 20 kcal | 836800 dJ |
| 50 kcal | 2.092000e+06 dJ |
| 100 kcal | 4.184000e+06 dJ |
| 500 kcal | 2.092000e+07 dJ |
| 1000 kcal | 4.184000e+07 dJ |
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How the formula works
Both kilocalorie and decijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilocalories by 41840 to get decijoules. To reverse the conversion, multiply a decijoule value by 0.00002390057361 to get back to kilocalories.
Frequently asked questions
What is Kilocalorie (kcal)?
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
What is Decijoule (dJ)?
A decijoule (dJ) is a metric-prefixed unit of energy equal to 10-1 joules, a fraction of a single joule, using the SI deci prefix.
How do I convert kilocalories to decijoules?
Multiply the kilocalorie value by 41840 to get the equivalent in decijoules. For example, 5 kcal × 41840 = 209200 dJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 41840 is an exact, non-rounded value.
Can I convert decijoules back to kilocalories?
Yes. Divide the decijoule value by 41840, or multiply it by 0.00002390057361, to get kilocalories.
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About converting kilocalories to decijoules
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels. A decijoule (dJ) is a metric-prefixed unit of energy equal to 10-1 joules, a fraction of a single joule, using the SI deci prefix.
Use this calculator to move between kilocalories and decijoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.