Kilocalorie to Joule
Convert kcal to J instantly — free, no sign-up.
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About the Kilocalorie (kcal)
The Kilocalorie is equal to 1,000 small calories — this is what a food label actually means by "Calories" (capital C), the standard unit for dietary energy in the US.
About the Joule (J)
The Joule is the SI unit of energy, defined as the work done by one newton of force over one meter — a single joule is roughly the energy released dropping an apple one meter.
How to convert kcal to J
- Enter the value in kcal in the box above.
- The J equivalent updates instantly.
- Use the swap button to convert J back to kcal just as easily.