Macronutrient Calculation Formula:
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This calculator determines the optimal macronutrient distribution (protein, carbs, fat) for weight loss based on your Total Daily Energy Expenditure (TDEE) and desired caloric deficit. The 30/40/30 ratio provides balanced nutrition while creating an energy deficit for fat loss.
The calculator uses these formulas:
Where:
Explanation: The 30/40/30 macronutrient split ensures adequate protein for muscle preservation, sufficient carbs for energy, and healthy fats for hormone production during weight loss.
Details: Proper macronutrient distribution helps maintain muscle mass, energy levels, and metabolic health during calorie restriction. Protein is prioritized to prevent muscle loss, while carbs and fats support physical and mental performance.
Tips: Enter your TDEE (calculate separately or use a TDEE calculator) and desired daily calorie deficit (typically 300-500 kcal/day for moderate weight loss). The calculator will output your daily macronutrient targets.
Q1: Why 30/40/30 ratio?
A: This balanced ratio works well for most people, providing 30% protein for muscle retention, 40% carbs for energy, and 30% fat for hormone health.
Q2: Can I adjust these ratios?
A: Yes, athletes may need more protein/carbs, while keto diets reduce carbs. However, 30/40/30 is a safe starting point.
Q3: How much deficit is safe?
A: Typically 300-500 kcal/day deficit for 0.5-1 lb/week loss. Extreme deficits (>1000 kcal) may cause muscle loss.
Q4: Should I track exact grams?
A: While precise tracking helps initially, focus on hitting protein targets and being approximately correct with carbs/fat.
Q5: When should I recalculate?
A: Recalculate when your weight changes significantly (±10 lbs) or if your activity level changes substantially.