Macro Calculator
Split calories among protein, carbohydrates, and fat and compare calories, grams, and percentages.
Estimated result
Enter your target calories to calculate the macronutrient distribution.
Grams use approximate factors of 4 kcal/g for protein and carbohydrate and 9 kcal/g for fat.
Calories to grams
Protein and carbohydrate use about 4 kcal/g and fat 9 kcal/g. The split preserves target calories.
Choosing a distribution
Presets are mathematical energy splits, not prescriptions for a health condition.
Frequently asked questions
Why are grams rounded?
Calculations retain precision and round only for practical display.
Is personal data sent to a server?
No. Calculations run locally in your browser and these values are not stored by default.
Can I use the result as medical advice?
No. It is an educational reference and does not replace individual assessment.
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