The Workout Macro Calculator converts a daily calorie target into grams of protein, carbohydrate, and fat. Protein is set from body weight, fat is assigned as a percentage of calories, and carbohydrate receives the remaining calories.
The model is useful for creating a starting nutrition plan around training. It does not determine an ideal calorie target or account for every medical, cultural, or performance need, so adjust the inputs based on progress, preference, and qualified advice.
Enter the calorie budget for the day.
Protein grams are calculated from this value.
Set grams of protein per kilogram.
Assign a share of calories to fat.
Carbohydrates receive calories left after protein and fat.
The output is a daily gram target for each macronutrient.
Protein and carbohydrate are calculated at 4 kcal/g and fat at 9 kcal/g.
Given: 2,400 kcal, 75 kg, 1.6 g/kg protein, 30% fat.
Calculation: Protein = 120 g (480 kcal). Fat = 720 ÷ 9 = 80 g. Carbs = (2,400 − 480 − 720) ÷ 4 = 300 g.
Result: 120 g protein, 300 g carbohydrate, and 80 g fat.
This model fixes protein and fat first, then assigns the remaining energy to carbohydrate.
Yes. Increasing fat percentage or protein rate lowers the carbohydrate remainder, provided total allocations stay within calories.
No. Alcohol would use part of the calorie budget and should be accounted for separately.
They can, but many people prefer a consistent plan. Calorie or carbohydrate cycling is an optional strategy.
The selected protein and fat calories exceed the calorie target. Reduce one of those settings or raise total calories.