Once you know your daily calorie target, splitting it into protein, carbohydrate, and fat grams — the three macronutrients — gives a more actionable plan for meal composition than a calorie number alone.
This calculator applies a percentage split to your calorie target and converts each portion into grams, using the standard conversion of 4 calories per gram for protein and carbs, and 9 calories per gram for fat.
The three preset splits cover common approaches — a balanced everyday split, a lower-carb approach, and a higher-protein split often used alongside strength training — though the right ratio ultimately depends on your individual goals and preferences.
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Frequently asked questions
Why does fat have a different calorie-per-gram conversion?
Fat is more calorie-dense than protein or carbohydrates — 9 calories per gram compared to 4 for the other two — which is a fixed physiological conversion, not a rounding choice.
Which split is right for me?
It depends on personal goals and preferences; a balanced split works well for general health, while higher-protein splits are often favored during strength training or muscle-building phases.