What is the kcal/g value for fats?

Fats are a key macronutrient and have the highest energy density among the three primary macronutrients: carbohydrates and proteins. The kcal/g value for fats is 9 kcal/g. This means that for every gram of fat consumed, the body receives 9 kilocalories of energy. This higher energy content is due to the chemical structure of fats, which have long chains of carbon and hydrogen atoms that store a significant amount of energy. This characteristic makes fats an important energy source, especially in diets where energy needs are high.

Carbohydrates typically provide about 4 kcal/g, and proteins also provide around 4 kcal/g, which illustrates the comparative energy density of fats. Understanding this value is crucial for making informed dietary choices, especially when considering caloric intake and macronutrient ratios in meal planning.