Macro Ratios will dynamically calculate your macronutrient targets to achieve the ratio of macros based on your calorie budget.
Your energy target will be derived dynamically from your total calories burned for the day.
Energy Target = BMR + Activity Level + Exercise +/- Weight Goal
For example, if your daily burn is 2250 kcal, and your weight loss goal is to lose half a pound per week, this will require a 250 kcal energy deficit, your energy target for the day will be 2000 kcal (2250kcal - 250 kcal). The protein, carbs, and fat targets will all then be calculated based on the chosen ratio to balance at your calorie target.
The energy/caloire target will dynamically change throughout the day if you log exercises or change a weight biometric. This will also consequently change your macronutrient targets.
By setting your targets to a dynamic ratio, note that you will not be able to set a specific gram amount for each macronutrient. To set your macronutrient targets as a numeric value, select Fixed Targets.
The numbers you enter into your ratio, will not be equivalent to the target numbers found in your diary.
As an example: a user enters a ratio of 25:40:35. Based on the user's settings for BMR, Activity, and Weight Loss Goal, an energy target for the day of 2000 kcal has been determined at the beginning of the day, before any foods or exercise has been logged.
Once the Energy target has been calculated, the user's macronutrient targets are:
Each Macronutrient has a different energy density calculated based on the Atwater Factors. In general:
Protein = 4 kcal/g
Carbohydrates = 4 kcal/g
Fat = 9 kcal/g
The percentage of each macro is displayed below each box.
Protein: 2000 kcal x 25% = 500 kcal
Carbohydrates: 2000 kcal x 40% = 800 kcal
Fat: 2000 kcal x 35% = 700 kcal
Dividing each calorie amount by the nutrient density will give the number of grams of each nutrient:
Protein: 500 kcal / 4 kcal/g = 125 g
Carbohydrates: 800 kcal / 4 kcal/g = 200 g
Fat: 700 kcal / 9 kcal/g = 77.8 g