Protein, Carbs, and Fat Ratios: The Right Split for Each Goal
Fat Loss: High Protein, Moderate Carbs
Recommended split: Protein 35%, Carbs 40%, Fat 25%. Protein high to preserve muscle. Moderate carbs support training performance. Fat kept minimal but not eliminated — essential fat-soluble vitamins (A, D, E, K) require dietary fat for absorption. Example: at 1800 calories: 158g protein, 180g carbs, 50g fat.
Muscle Gain: Moderate Protein, Higher Carbs
Recommended split: Protein 25–30%, Carbs 45–50%, Fat 20–25%. Carbohydrates support high training volume and replenish glycogen. Protein target of 1.6–2 g/kg is sufficient for muscle synthesis — going higher produces diminishing returns. Surplus calories primarily from carbohydrates.
Endurance Training: Carb Emphasis
Endurance athletes often need 55–65% carbohydrates to maintain glycogen stores for prolonged aerobic effort. Protein 20–25% for muscle repair. Fat 15–20%. During long events (>90 min), carbohydrate intake during exercise (30–90g/hr) becomes important for sustaining intensity.
Maintenance: Balanced Distribution
For maintenance without a specific performance goal: Protein 20–25%, Carbs 45–50%, Fat 25–30%. This closely mirrors major dietary guidelines and supports general health. Macro Calculator lets you select any goal and see the specific gram targets at your calorie level.
Frequently Asked Questions
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