Macro Calculator: Precision Protein, Fat & Carbohydrate Solver
Calculate exact macronutrient grams for fat loss, muscle growth, or maintenance. Customized protein, fat, and carb ratios backed by sports nutrition.
What is your primary goal?
High protein deficit to shred body fat while preserving muscle
Your Daily Calorie Target
500 kcal deficit from your 2,711 TDEE
Your Daily Macro Targets
💡 Per Gram of Body Weight
🔗 Refine Your Plan — Your data carries over automatically
Understanding Macronutrient Splitting
While your Total Daily Energy Expenditure (TDEE) determines whether you lose, maintain, or gain weight, your macronutrient split determines the composition of that weight change. Proper macro allocation ensures you are losing fat (not muscle) during a cut, or gaining muscle (not excess fat) during a bulk.
Our macro calculator uses evidence-based sports nutrition ratios:
- Protein (4 kcal/g): Essential for muscle protein synthesis (MPS) and tissue repair. Highly satiating and has the highest Thermic Effect of Food (TEF) at 20-30%.
- Dietary Fat (9 kcal/g): Critical for hormone production (including testosterone), nutrient absorption (Vitamins A, D, E, K), and cognitive function.
- Carbohydrates (4 kcal/g): The body's preferred and most efficient energy source. Replenishes muscle glycogen for high-intensity training.
The Importance of Protein in a Deficit
When consuming fewer calories than your body requires (a cut), the risk of catabolism (muscle loss) increases significantly. To combat this, our "Fat Loss" preset automatically elevates your protein intake to 40% of total calories. This preserves lean body mass, ensuring that the weight you lose comes almost entirely from stored adipose tissue (body fat).
Reviewed against peer-reviewed primary sources by the TDEEmacro Editorial Team · Last reviewed 2026-08-24
Formulas and clinical thresholds on this page are grounded in peer-reviewed primary literature and established physiological standards. Always consult a registered dietitian or physician before changing your dietary or exercise protocol.
- Mifflin-St Jeor resting energy expenditure equation Mifflin MD, et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr. 1990;51(2):241-247.
- Evidence-based sports nutrition and macronutrient distribution Morton RW, et al. A systematic review, meta-analysis of protein supplementation on resistance training. Br J Sports Med. 2018;52(6):376-384.
Frequently Asked Questions (Macronutrient Ratios, Carb Timing & Fiber)
How does this macro calculator determine my daily protein requirement?
Our calculator anchors protein to lean body mass and training volume, allocating 0.82 to 1.2g of protein per pound of body weight to optimize muscle protein synthesis.
What is the minimum amount of dietary fat needed for healthy hormones?
Dietary fat should rarely drop below 0.3g per pound of body weight (or ~20% of total calories) to ensure adequate fat-soluble vitamin absorption and sex hormone production.
Can I adjust my carbohydrate intake based on workout training days?
Yes. Our tool allows dynamic carb allocation, shifting higher carbohydrate percentages to intense training days and lower carbs to rest days via Carb Cycling mode.
What is the best macro split for weight loss?
For sustainable weight loss and fat burning, a high-protein macro split is universally recommended by sports dietitians. A highly effective starting ratio is 40% Protein, 30% Fat, and 30% Carbohydrates (40/30/30). The elevated protein prevents muscle loss in a calorie deficit and maximizes satiety, while moderate carbs support training intensity.
What is the difference between counting macros vs. calories?
Counting calories controls your overall weight (whether you gain or lose), but counting macros controls your body composition (what kind of weight you gain or lose). If you only count calories and ignore macros, you risk losing valuable muscle mass instead of fat. Tracking macros ensures you get enough protein to preserve muscle and enough fats for hormonal health.
How do I adjust my macros to build muscle?
To build muscle (hypertrophy), you must be in a caloric surplus with sufficient protein and high carbohydrates. A standard muscle-building macro ratio is 30% Protein, 50% Carbohydrates, and 20% Fat. Carbohydrates are heavily prioritized during a bulking phase because they trigger insulin release (an anabolic hormone) and completely fill intramuscular glycogen stores for intense lifting.
Can I track macros without weighing my food?
While weighing food on a digital scale is the only way to be 100% accurate, you can successfully track macros using visual portion control methods (like the hand-size method: a palm of protein, a fist of carbs, a thumb of fats). However, if you hit a weight loss plateau, hidden calories from unweighed cooking oils and peanut butter are usually the culprit.
How often should I recalculate my macros?
You should recalculate your macros every time your body weight changes by 5 to 10 pounds, or if your scale weight plateaus for more than 2 weeks. As your body mass decreases, your Total Daily Energy Expenditure (TDEE) also shrinks, meaning your original macro targets will eventually become your new maintenance level.