kcal to kJ Converter
Convert Kilocalories (kcal) to Kilojoules (kJ) instantly.
Enter Value
Conversion Result
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Formula & Conversion Step:
What is the Kilocalories to Kilojoules Converter?
The Kilocalories (kcal) to Kilojoules (kJ) converter is an international dietary tool. It translates US nutritional "Food Calories" into the metric Kilojoules used by the rest of the world (Europe, Australia, etc.) for food energy labeling.
How It Works (Formula)
In thermodynamics, one biological kilocalorie (kcal) is equivalent to exactly 4.184 metric kilojoules (kJ). To convert from the US system into the international system, the calculator simply multiplies your inputted kilocalories by 4.184.
$$ E_{(\text{kJ})} = E_{(\text{kcal})} \times 4.184 $$
The international standard multiplier for global food energy.
How to Use It
Enter the nutritional value in Kilocalories (often listed as "Calories" on US food labels). The calculator will instantly multiply the value by 4.184 and output the metric equivalent in Kilojoules (kJ). For example, a 500 kcal meal provides 2,092 kJ of energy.