How it works? Once you know the number of calories you need, you can enter that number into the Daily Calories section. From there, you can either use the slide feature to select your own percentages which will help determine the targeted number of grams for each macronutrient (i.e., Carbohydrates, Protein and Fats) or you can use one of the three presets (i.e., Foundational Fat Loss, Performance Fat Loss and Peak Fat Loss). Below, you can find the breakdown for the three presets: Foundational Fat Loss = 40% Carbs, 30% Protein and 30% Fat Performance Fat Loss = 34% Carbs, 33% Protein and 33% Fat Peak Fat Loss = 20% Carbs, 30% Protein and 50% Fat Please Note: If you use the slide feature, always make sure it totals 100%. Daily calories: Presets: Grams per day: Carbohydrates: 45 % - Proteins: 30 % - Fats: 30 % - Total percentage: 100% Calculate!