A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega prefix.
Megajoules to Kilocalories
Convert Megajoule (MJ) to Kilocalorie (kcal) instantly with an exact formula, conversion table, and FAQ.
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Convert megajoules (MJ) 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 = MJ × 239.0057361
Results update instantly for Megajoules to Kilocalories conversions.
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Formula
kcal = MJ × 239.0057361
MJ = kcal × 0.004184
Conversion table
| 1 MJ | 239.005736 kcal |
| 5 MJ | 1195.028681 kcal |
| 10 MJ | 2390.057361 kcal |
| 20 MJ | 4780.114723 kcal |
| 50 MJ | 11950.286807 kcal |
| 100 MJ | 23900.573614 kcal |
| 500 MJ | 119502.868069 kcal |
| 1000 MJ | 239005.736138 kcal |
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How the formula works
Both megajoule and kilocalorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in megajoules by 239.0057361 to get kilocalories. To reverse the conversion, multiply a kilocalorie value by 0.004184 to get back to megajoules.
Frequently asked questions
What is Megajoule (MJ)?
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega 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 megajoules to kilocalories?
Multiply the megajoule value by 239.0057361 to get the equivalent in kilocalories. For example, 5 MJ × 239.0057361 = 1195.028681 kcal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 239.0057361 is an exact, non-rounded value.
Can I convert kilocalories back to megajoules?
Yes. Divide the kilocalorie value by 239.0057361, or multiply it by 0.004184, to get megajoules.
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About converting megajoules to kilocalories
A megajoule (MJ) is a metric-prefixed unit of energy equal to 106 joules, using the SI mega 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 megajoules 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.