How many calories are there in one gram of fat?

One gram of fat contains 9 calories. This value is significant in nutrition and dietary planning because fat is the most calorie-dense macronutrient compared to carbohydrates and proteins, which each provide approximately 4 calories per gram.

Understanding the calorie content of fat is crucial for those managing weight or balancing their macronutrient intake, as fats play essential roles in hormone production, nutrient absorption, and overall health. The higher calorie content means that even small amounts of fat can contribute significantly to total daily caloric intake. This knowledge helps in making informed dietary choices, especially when considering the balance of nutrients in meals.