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Macro Split Calculator

Convert a calorie target into grams of protein, carbs, and fat. Pick from five evidence-based strategies or set custom ratios.

🔒 All math runs in your browser. Data never leaves this device.

Frequently asked questions

How do macros convert from calories?

Protein 4 kcal/g, carbs 4 kcal/g, fat 9 kcal/g.

Which split is best for weight loss?

High-protein (35/35/30) preserves lean mass during a deficit. Balanced (30/40/30) is the safe default.

How much protein do I need?

1.2–1.6 g per kg of target body weight for active adults. For older adults or during weight loss, 1.6–2.2 g/kg.