Macro Calculator
Find your perfect balance of proteins, carbohydrates, and fats to fuel your body and reach your goals.
Based on the Mifflin-St Jeor equation. 1g Protein = 4 kcal, 1g Carbs = 4 kcal, 1g Fat = 9 kcal.
🏆 Balancing Your Macronutrients
Everything you need to know about using this calculator and the math behind it.
How it Works
Breaks down your daily caloric target into optimal percentages of proteins, fats, and carbohydrates based on your specific fitness goals.
The Formula
Protein = 4 kcal/g, Carbs = 4 kcal/g, Fats = 9 kcal/g. Ratios depend on the chosen diet plan (e.g., 40/30/30).
Pro Tip
Protein is essential for muscle repair, but don't fear carbs—they are your body's primary energy source for workouts.
Frequently Asked Questions
What are macronutrients and why do they matter? +
Macronutrients (macros) are the three primary nutrients your body needs in large amounts: protein (4 cal/g), carbohydrates (4 cal/g), and fat (9 cal/g). Together they make up all your calories. Tracking macros rather than just calories gives you finer control over body composition — you can lose fat while gaining muscle if protein is high, or optimize energy for athletic performance by adjusting carb intake.
How much protein do I actually need? +
The RDA is 0.8g per kg of bodyweight, but this is the minimum to prevent deficiency — not optimal for athletes or active people. Research supports 1.6–2.2g/kg for muscle building and preservation. In a calorie deficit, consuming up to 2.4g/kg can help preserve muscle. Spreading intake across 3–4 meals maximizes muscle protein synthesis. Exceeding 2.2g/kg provides diminishing returns for most people.
What macro ratio is best for weight loss? +
For weight loss, total calories matter most. But among macro splits, higher protein (30–40% of calories) improves satiety, preserves muscle, and slightly boosts metabolism via the thermic effect of food. Beyond protein, the carb/fat split is personal preference — some do better on lower carb (ketogenic: <5% carbs), others on moderate carb (40%). What you can sustain consistently is always better than the "optimal" ratio you hate.
Should carbs be eaten before or after workouts? +
Both timing strategies work. Pre-workout carbs (1–2 hours before) fuel performance by filling muscle glycogen. Post-workout carbs (within 1–2 hours after) help replenish glycogen and support recovery. A practical approach: eat a balanced meal with carbs and protein 2–3 hours before, and have another balanced meal within 2 hours after. The specifics matter less for general fitness — total daily intake is far more important.
Is tracking macros necessary long-term? +
Not for everyone. Macro tracking is a powerful learning tool — even 6–12 weeks of tracking teaches you the composition of foods and builds intuition for eating well. After that, many people can maintain results through mindful eating without logging every gram. Competitive athletes and those with specific body composition goals often track longer-term. If tracking feels obsessive or stressful, intuitive eating with focus on protein and whole foods works well for most people.