OK, this may be a silly question, but I'm clueless. I'm looking at a cookbook (400 Best-Ever Soups, in case you're wondering) and the nutritional info on each recipe lists:
A kcal is what most people in the US call a Calorie (capital C). When a food label lists Calories, it really means kcal. And when your HRM tells you how may Calories you've burned, it means kcal. Hope this helps!
"The “calorie” we refer to in food is actually kilocalorie. 1 kilocalorie is the same as 1 Calorie (upper case C). A kilocalorie is the amount of heat required to raise the temperature of 1 kilogram of water one degree Celsius."
Not sure how helpful this is, but wanted to post it for you.