Macro Calculator - Protein, Carbs, Fat

Getting the right answer starts with the right formula. The Macro Calculator handles the computation so you can focus on the decision. Health metrics give you a snapshot of where you stand, but they are not a diagnosis. Basal metabolic rate estimates use equations like Harris-Benedict or Mifflin-St Jeor, which factor in age, sex, height, and weight. The required inputs are daily calories, protein, carbs and fat.

Once provided, the result — protein, carbs and fat — appears instantly. Whether you need to calculate daily macronutrients based on calorie and macro targets for a quick check or a thorough analysis, this tool adapts to both. You can set any macro split that matches your goals or diet plan. Use results as a conversation starter with a healthcare professional, not as a substitute for medical advice. Body composition, metabolism, and vital signs interact in complex ways that a single number cannot capture. Results are rounded for display; the underlying computation retains full precision.