Macro Calculator
Calculate your daily protein, carbohydrate, and fat targets from your calorie goal.
Your Settings
Use our TDEE Calculator to find your maintenance calories
Remaining after protein + fat
Your Daily Macros
Macro split by calories
Guide
How it works
Counting macros — protein, carbohydrates, and fat — is a more nuanced approach to nutrition than simply tracking total calories. It gives you control over body composition, not just body weight. Two people eating 2,000 calories can have dramatically different physiques if their macro ratios differ, because each macronutrient has distinct metabolic roles beyond pure energy.
IIFYM vs. Clean Eating
"If It Fits Your Macros" (IIFYM) is the philosophy that food choices matter less than macro totals — a position backed by controlled research showing that calorie-and-protein-matched diets produce similar fat loss regardless of food quality. Clean eating advocates argue that micronutrients, fiber, and food processing affect hormones and gut health in ways that calorie math does not capture. The truth is somewhere between: macro tracking ensures you hit quantitative targets, while food quality determines whether you get adequate micronutrients, fiber, and satiety. Both matter.
Carbohydrates and Insulin: Debunking the Villain Narrative
The idea that carbohydrates cause fat gain through insulin spikes has been widely popularised but is inconsistent with the controlled evidence. In metabolic ward studies where calories and protein are matched, low-carb and high-carb diets produce equivalent fat loss. Insulin is a storage hormone, yes — but it also strongly suppresses appetite. The main reason low-carb diets work for many people is improved satiety and reduced overall calorie intake, not some unique metabolic advantage of lowering insulin per se.
Dietary Fat and Hormones
Fat is uniquely critical for hormone production. Steroid hormones — testosterone, estrogen, cortisol, DHEA — are all synthesised from cholesterol, which requires adequate dietary fat. Studies in male athletes show that dropping fat intake below 15% of calories significantly reduces free testosterone levels. This is why keto and high-fat diets often maintain hormonal health better than extremely low-fat approaches, despite the popular assumption that dietary fat is harmful. Essential fatty acids (omega-3 and omega-6) also regulate inflammation, cell membrane integrity, and brain function.
Fiber: The Underappreciated Fourth Macro
Fiber is technically a carbohydrate, but it deserves its own consideration. Soluble fiber (oats, beans, apples) forms a gel in your gut that slows glucose absorption and feeds beneficial bacteria. Insoluble fiber (vegetables, whole grains) adds bulk and promotes motility. The recommended 14g per 1,000 calories is a minimum — populations with historically low rates of colon cancer consume 30–50g daily. Fiber also adds significant satiety without contributing meaningfully to calorie intake, which makes high-fiber foods invaluable in fat loss phases.
Tracking Apps and Practical Strategies
Apps like MyFitnessPal and Cronometer make macro tracking feasible. The key discipline is weighing food on a kitchen scale rather than estimating portions — visual estimates of calorie-dense foods like nuts, oils, and cheese are notoriously inaccurate. If weight loss stalls after 3–4 weeks on a deficit, consider a 2-week diet break at maintenance before resuming. This partially reverses adaptive thermogenesis and often restarts progress.
Carb Cycling: Periodising Your Macros
Advanced athletes sometimes cycle carbohydrates — eating more on training days (when glycogen demands are higher) and less on rest days. This can optimise muscle glycogen without chronically high carb intake. For most people, daily consistency matters far more than day-to-day variation. Carb cycling is a refinement strategy, not a foundation. Start with consistent daily targets before experimenting with cycling.
What's the difference between macros and calories?expand_more
Calories are a measure of total energy. Macros (protein, carbs, fat) are the three categories of nutrients that provide those calories. Protein and carbs each provide 4 calories per gram; fat provides 9 calories per gram. Counting macros automatically controls calories, but also controls the ratio of nutrients — which affects body composition, hormones, and satiety differently than calorie counting alone.
Is counting macros better than just counting calories?expand_more
For body composition goals (building muscle while losing fat, or vice versa), macro tracking is more precise. It ensures you preserve muscle with adequate protein, maintain hormonal health with sufficient fat, and fuel performance with appropriate carbs. For simple weight management without body composition concerns, calorie counting alone is often sufficient and simpler to maintain.
What are net carbs?expand_more
Net carbs are total carbohydrates minus dietary fiber. Since fiber is indigestible and does not raise blood glucose, it is excluded from net carb calculations — particularly relevant on ketogenic diets where carb limits are strict. Sugar alcohols (like erythritol) are sometimes also subtracted, though their impact varies. This calculator uses total carbs, not net carbs.
How long does it take to see results from macro tracking?expand_more
Meaningful body composition changes — visible changes in muscle definition or fat distribution — typically take 8–12 weeks of consistent tracking. Weight changes on the scale can appear in 1–2 weeks, but this often reflects water and glycogen fluctuations rather than actual fat change. A DEXA scan at 12 weeks compared to baseline is the most accurate way to measure true body composition change.
Can I build muscle on a plant-based diet?expand_more
Yes, absolutely. The key requirements are meeting total protein targets (possibly 10–20% higher than omnivore targets to account for digestibility), prioritising leucine-rich plant sources (edamame, tempeh, pumpkin seeds, soy protein), and combining varied protein sources throughout the day. Creatine supplementation — often lower in plant-based eaters due to its absence in plant foods — has strong evidence for supporting strength and muscle gain.
Next steps