What is the difference between European kcal and US cal on food labels?

The key difference between European kcal and US cal on food labels lies in the terminology used for energy measurement. In the US, food energy is typically listed in calories (cal), which actually refers to kilocalories (kcal) in scientific terms, where 1 kcal equals 1,000 calories. In Europe, food energy is also expressed in kilocalories (kcal), but the term "calories" is commonly used interchangeably to refer to kilocalories as well. Thus, when comparing food labels, both regions are essentially using the same unit of measurement for energy, though the terminology may differ.