Macros for Muscle Gain: How to Eat to Build Muscle

Building muscle needs three things: progressive strength training, enough protein, and enough energy. Here's how to set your macros for a lean bulk without gaining more fat than necessary.

Key takeaways

• Muscle gain needs progressive strength training, 1.6–2.2 g/kg protein and a small 200–300 kcal surplus.
• Carbs of about 3–5 g/kg fuel training; fat stays at 20–35% of calories.
• Gain slowly to limit fat: roughly 0.25–0.5% of body weight per week for beginners.

Step 1: A small calorie surplus

Eat about 200–300 kcal above maintenance. Beginners can gain faster; experienced lifters should go slower. A common guideline is about 0.25–0.5% of body weight per week for beginners and less for experienced lifters. Start modest and adjust based on your trend.

Find maintenance in maintenance calories.

Step 2: Protein 1.6–2.2 g/kg

Research suggests most muscle-building benefit comes by around 1.6 g/kg per day, with up to 2.2 g/kg as a safe upper range many lifters use. Spread it over 3–5 meals of 25–40 g.

Step 3: Carbs to fuel training

Carbs power hard training sessions. Many lifters do well with 3–5 g/kg of carbs, more for high training volume.

Step 4: Fat 20–35%

Keep fat moderate so there's room for carbs, but not too low.

Sample targets (75 kg lifter, ~2,800 kcal)

Sample day

• Breakfast: proats (oats, whey, banana, milk), ~600 kcal, 40 g protein
• Lunch: chicken, rice, vegetables, olive oil, ~750 kcal, 50 g protein
• Pre-workout: bagel with honey + Greek yogurt, ~450 kcal, 25 g protein
• Dinner: salmon, potatoes, salad, ~750 kcal, 40 g protein
• Evening: cottage cheese with berries, ~250 kcal, 25 g protein

Common mistakes

• Dirty bulking: eating everything leads to more fat gain than muscle.
• Too little protein at breakfast. See high-protein breakfast.
• Not tracking weekly weight: without a trend you can't tell if the surplus is right.

Track it

Nutora lets you set a muscle-gain goal and tracks protein and calories from meal photos. See also body recomposition and how to calculate macros.

Frequently asked questions

How much protein do I need to build muscle?

About 1.6–2.2 g per kg of body weight per day.

Do I need a calorie surplus to build muscle?

It helps most people; beginners and people with higher body fat can sometimes build muscle at maintenance.

How many carbs for muscle gain?

Often 3–5 g per kg of body weight, depending on training volume.

How fast should I gain weight on a bulk?

Slowly; small, steady gains limit fat gain.