A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
Kilojoules to Kilocalories
Convert Kilojoule (kJ) to Kilocalorie (kcal) instantly with an exact formula, conversion table, and FAQ.
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Convert kilojoules (kJ) 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 = kJ × 0.2390057361
Results update instantly for Kilojoules to Kilocalories conversions.
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Formula
kcal = kJ × 0.2390057361
kJ = kcal × 4.184
Conversion table
| 1 kJ | 0.239006 kcal |
| 5 kJ | 1.195029 kcal |
| 10 kJ | 2.390057 kcal |
| 20 kJ | 4.780115 kcal |
| 50 kJ | 11.950287 kcal |
| 100 kJ | 23.900574 kcal |
| 500 kJ | 119.502868 kcal |
| 1000 kJ | 239.005736 kcal |
Related conversions
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How the formula works
Both kilojoule and kilocalorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilojoules by 0.2390057361 to get kilocalories. To reverse the conversion, multiply a kilocalorie value by 4.184 to get back to kilojoules.
Frequently asked questions
What is Kilojoule (kJ)?
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
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 kilojoules to kilocalories?
Multiply the kilojoule value by 0.2390057361 to get the equivalent in kilocalories. For example, 5 kJ × 0.2390057361 = 1.195029 kcal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.2390057361 is an exact, non-rounded value.
Can I convert kilocalories back to kilojoules?
Yes. Divide the kilocalorie value by 0.2390057361, or multiply it by 4.184, to get kilojoules.
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About converting kilojoules to kilocalories
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States. 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 kilojoules 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.