Macro Calculator

Macros — short for macronutrients — are the three main nutrients your body needs in large amounts: protein, carbohydrates, and fat. Each plays a distinct role in your body:

• Protein (4 cal/g) — builds and repairs muscle tissue, supports immune function, and keeps you feeling full.
• Carbohydrates (4 cal/g) — your body's preferred energy source, especially important for high-intensity training and brain function.
• Fat (9 cal/g) — essential for hormone production, nutrient absorption, and cell membrane health.

How to calculate your macros

1. Find your daily calorie target — use a TDEE calculator to determine how many calories you need, then adjust for your goal (deficit for fat loss, surplus for muscle gain).
2. Choose your macro ratio — pick a goal-based preset or set a custom split. The percentages represent what portion of your total calories comes from each macronutrient.
3. Convert to grams — multiply your calories by each percentage, then divide by calories per gram (protein: 4, carbs: 4, fat: 9). This calculator does this math for you instantly.

Best macro ratio for weight loss

For fat loss, a 40% protein / 30% carbs / 30% fat split is a proven starting point. The higher protein intake is critical — it preserves lean muscle mass while you're in a calorie deficit, keeps you satiated, and has the highest thermic effect of food (your body burns more calories digesting protein than carbs or fat).

That said, the best ratio is the one you can actually sustain. If you feel low-energy with 30% carbs, try 35% protein / 35% carbs / 30% fat instead. Consistency matters more than perfection.

Best macro ratio for muscle gain

For building muscle, aim for 25-30% protein / 45-50% carbs / 25% fat. Carbohydrates are your training fuel — they replenish glycogen stores, power intense workouts, and support recovery. More carbs mean better performance in the gym, which drives muscle growth.

Protein should be at least 0.7-1g per pound of body weight to maximize muscle protein synthesis. Fat shouldn't drop below 20% of total calories to maintain healthy hormone levels, particularly testosterone.

Macros vs. calorie counting — what's the difference?

Calorie counting tells you how much to eat. Tracking macros tells you what to eat. Two people eating 2,000 calories could have completely different results — one eating mostly protein and vegetables, the other eating mostly refined carbs and little protein.

If your goal is simply weight management, calorie counting may be enough. But if you care about body composition — losing fat while keeping muscle, or gaining muscle without excess fat — tracking macros gives you the precision to do that.