calorie
Commonly used in contexts of food energy, diet, and exercise. In Japanese, it typically refers to the kilocalorie (kcal) in nutritional contexts, though the same word is used.
This rice ball is about 200 calories.
I count calories every day when I eat.
This cake is high in calories.
I burned calories by exercising.
You should consume the calories you need each day.
While dieting, I try to keep my calorie intake down.
empty calories