Printed on 3/17/2026
For informational purposes only. This is not medical advice.
Macronutrients — protein, carbohydrates, and fat — are the building blocks of your diet. This calculator converts your calorie target into actionable gram targets for each macro, using evidence-based splits optimized for your fitness goal: weight loss (cutting), maintenance, or muscle gain (bulking).
Formula: Protein: 30% of calories ÷ 4, Carbs: 40% ÷ 4, Fat: 30% ÷ 9
Enter your stats and activity level. The calculator first determines your Total Daily Energy Expenditure using the Mifflin-St Jeor equation, then adjusts for your goal. Already know your TDEE? Use our [TDEE Calculator](/tools/tdee-calculator) to calculate it separately.
Your calorie target is divided into protein (30%), carbohydrates (40%), and fat (30%). This balanced split works for most goals; athletes may customize further.
View your protein, carb, and fat targets in grams per day. Use these numbers to plan meals, track intake, or set up your food tracking app.
Lifters seeking fat loss + muscle
Macro tracking ensures adequate protein (1.6–2.2 g/kg) during a deficit, preserving muscle while losing fat. This is the foundation of successful recomposition.
Bodybuilders & physique athletes
Precision macro tracking is essential for competition prep. Competitors adjust macros weekly based on progress photos, weight trends, and performance.
Runners, cyclists & triathletes
Endurance athletes need higher carbohydrate ratios (50–60%) to fuel training. Macro calculators help ensure adequate glycogen replenishment.
Anyone seeking dietary flexibility
If It Fits Your Macros (IIFYM) allows food flexibility while hitting targets. Knowing your macros lets you enjoy varied foods without derailing progress.
Natural lifters gaining muscle
A controlled surplus with adequate protein maximizes muscle gain while minimizing fat accumulation. Macro targets prevent 'dirty bulking' excess.
Dietitians & coaches
Coaches use macro calculators to set initial client targets, then adjust based on adherence, progress, and feedback over weeks of tracking.
Hit your protein target every day — it's the most important macro for body composition. Carbs and fat can flex more; protein should be consistent.
Research consistently shows this range optimizes muscle protein synthesis. Higher isn't necessarily better — 2.2 g/kg is the practical ceiling for most people.
During a deficit, bump protein to 2.0–2.4 g/kg to preserve muscle. The leaner you get, the more protein matters for preventing muscle loss.
Eating carbs before and after workouts improves performance and recovery. If carbs are limited, prioritize them in your pre/post-workout meals.
Fat is essential for hormone production (including testosterone), brain function, and vitamin absorption. Don't drop below 0.5 g/kg or 20% of calories.
Eyeballing portions typically underestimates intake by 20–50%. A $15 food scale is the single best investment for accurate macro tracking.
Don't adjust macros based on one day or one weigh-in. Track consistently for 2+ weeks, then assess trends before making changes.
Hitting macros within ±5–10g is perfectly fine. Obsessing over exact numbers creates stress without meaningful benefit. Consistency beats perfection.
Losing 5 kg? Your [TDEE](/tools/tdee-calculator) dropped ~200 kcal. Recalculate every 4–8 weeks to ensure your macros still match your current body and goals.
Macros matter, but so do micronutrients. Hitting your macros from whole foods (lean meats, vegetables, whole grains) beats processed alternatives for health.
Protein recommendations (1.6–2.2 g/kg for muscle building) are based on meta-analyses published in the British Journal of Sports Medicine (Morton et al., 2018). The default macro split aligns with position statements from the International Society of Sports Nutrition (ISSN) and Academy of Nutrition and Dietetics.
Your results show daily gram targets for protein, carbohydrates, and fat, along with the total calorie target adjusted for your goal (maintenance, weight loss, or muscle gain). Protein and carbohydrates each provide 4 calories per gram, while fat provides 9 calories per gram.
The protein target (30% of calories) generally falls within the 1.6–2.2 g/kg range recommended for active individuals. The carbohydrate target (40%) provides the primary fuel for exercise and brain function. The fat target (30%) supports hormone production, cell membrane integrity, and absorption of fat-soluble vitamins (A, D, E, K). These are starting targets — adjust them based on your individual response, training demands, and preferences.
Use this calculator after determining your TDEE to break your calorie target into actionable macronutrient goals. It is especially useful when starting a structured nutrition plan for body recomposition, athletic performance, or weight management.
Macro tracking is particularly valuable during a calorie deficit (cutting), where adequate protein intake is critical to preserve lean muscle mass. It is also helpful for athletes who need to ensure sufficient carbohydrate intake to fuel training and recovery.
The default 30/40/30 split (protein/carbs/fat) is a general-purpose starting point and may not be optimal for everyone. Endurance athletes often benefit from a higher carbohydrate ratio (50–60%), while individuals on ketogenic or low-carb diets will need a fundamentally different macro distribution.
This calculator does not account for micronutrient needs, meal timing, or food quality — all of which matter for health and performance beyond macros alone. Individuals with kidney disease should consult a clinician before adopting a high-protein diet, as excessive protein intake may accelerate renal decline in those with pre-existing kidney conditions.
As with TDEE, the underlying calorie estimate is approximate. Use your macro targets as a starting framework and adjust based on real-world results over 2–3 weeks.
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.
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