Please note that a Kcal is the proper scientific term for a food Calorie or a Big C Calorie as they are sometimes called.

"One food Calorie (1 kcal or 1,000 calories) is the amount of digestively available food energy (heat) that will raise the temperature of one kilogram of water one degree Celsius. Some advocate the convention of the capitalizing the C in these so that one food Calorie is equal to 1000 lowercase calories..." - Wikopedia.

i.e. 3000 kcal is 3000 Food Calories