Fitsuite Tools

Macro Calculator for Muscle Gain

Building muscle requires not just a calorie surplus but the right balance of macronutrients. Use our calculator to find your ideal macro breakdown for maximizing lean mass gains while minimizing fat accumulation.

Optimal Macros for Building Muscle

For muscle gain, aim for 1.6-2.2g of protein per kg body weight (about 25-30% of calories), 45-55% of calories from carbohydrates, and 20-30% from fat. Carbohydrates are crucial during a bulk because they fuel intense training, replenish glycogen stores, and create an anabolic hormonal environment that supports muscle growth.

Meal Timing and Distribution

Distribute protein across 4-5 meals with 25-40g per meal to maximize muscle protein synthesis. Prioritize carbohydrates around workouts: a carb-rich meal 2-3 hours before training and a protein-plus-carb meal within 2 hours after training. This approach optimizes performance, recovery, and muscle growth.

Frequently Asked Questions

How much protein do I need to build muscle?
Research supports 1.6-2.2g of protein per kg body weight per day for maximizing muscle growth. For a 80 kg person, that is 128-176g of protein daily. Going higher than 2.2g/kg has not been shown to provide additional muscle-building benefits.
Why are carbs important for muscle gain?
Carbohydrates fuel high-intensity training, replenish muscle glycogen, stimulate insulin (which aids nutrient uptake into muscles), and spare protein from being used as fuel. Cutting carbs during a bulk limits training performance and can slow muscle growth.

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