Macro Calculator

Last updated: July 4, 2026
Reviewed by Dr. Alana Reyes, MD

About this Calculator

Macronutrients (carbohydrates, proteins, and fats) make up the bulk of your calorie intake. Balancing your macros helps support body composition goals.

Formula & Calculations

Mathematical Formula

Macros (grams) derived from calorie targets and diet ratios

Calculates grams based on calorie values (Carbs/Protein: 4 kcal/g, Fats: 9 kcal/g).

How to Calculate Step-by-Step

1

Enter calories

Target daily caloric limit.

2

Multiply ratios

Solve calories per macro type.

3

Convert to grams

Divide calorie splits by energy factor.

How to Use & Best Practices

Enter daily calories and choose your diet distribution strategy.

Frequently Asked Questions

What are macros?

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Macronutrients include protein, carbohydrates, and dietary fats.

Dr. Alana Reyes, MD, MPH Clinical Reviewer

Dr. Reyes is a board-certified endocrinologist specializing in metabolic health.

Want to learn more about this calculator?

Ask our AI assistant for explanations, formulas, or usage advice.

Macro Calculator

Carbohydrates 200g (800 kcal)
Protein Target 150g (600 kcal)
Healthy Fats 67g (600 kcal)
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