How many calories are there per gram of body fat?

1) 1 kg has 1000 grams; 2) Fat has 9 calories per gram 3) Human fat tissue is approximately 87% lipid 4) Putting these together, we get 7830 (0.87*9*1000) It is estimated that 1 kg of weight gain (fat gain) represents 7500 kcal of caloric excess. read more

Compare this to protein or carbohydrates, which each contain 4 calories per gram, and you can see why a diet high in fat can lead to weight gain. Calorie Density Sources of calories for the body are divided into those from fat, carbohydrates, protein, and alcohol. read more

There are 9 calories per gram of fat while one gram of carbohydrates and proteins contains 4 calories each. The body requires fats, hence they must be part of a healthy diet. The Institute of Medicine recommends that adults should derive 20-35% of their daily calories from fat. read more

Carbohydrate provides 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram. For more information about these three macronutrients, visit the FNIC webpages for Carbohydrates, Proteins, and Fats. read more