How much protein do I need to build muscle?

Research consistently supports 1.6-2.2 g of protein per kg of body weight per day for maximizing muscle growth when combined with resistance training. Going above 2.2 g/kg has not been shown to provide additional muscle-building benefits in most studies.

Is 2.2 g/kg of protein safe for muscle gain?

Yes, 2.2 g/kg (about 1 g per pound) is well within safe limits for healthy individuals. Multiple meta-analyses and position statements from sports nutrition organizations support this range for athletes and those doing regular resistance training.

When should I eat protein for muscle gain?

Distributing protein intake evenly across 3-5 meals throughout the day is more important than exact timing. Having 20-40 g of protein within a few hours of training can support recovery, but total daily intake matters most for muscle growth.

Do I need protein supplements to build muscle?

No. Whole food sources of protein are perfectly effective for muscle gain. Supplements like whey protein are convenient for meeting daily targets but are not required. Focus on hitting your total daily protein goal from any combination of foods and supplements.

Protein Calculator for Muscle Gain

Find your optimal daily protein target for maximizing muscle growth and hypertrophy. Based on the 1.6–2.2 g/kg range supported by sports nutrition research.

Sex

Age

Weight

Height (cm)

Activity Level

How Much Protein Do You Need to Build Muscle?

Building muscle requires a combination of resistance training and adequate protein intake. Research consistently shows that consuming 1.6–2.2 grams of protein per kilogram of body weight per day is optimal for maximizing muscle protein synthesis when combined with progressive resistance training.

This range — approximately 0.7–1.0 grams per pound — is supported by multiple meta-analyses and position statements from international sports nutrition organizations. Going above 2.2 g/kg has not been shown to provide additional muscle-building benefits in most studies.

Protein Timing for Muscle Growth

Distribution

Spread protein across 3–5 meals with 20–40g per meal to optimize muscle protein synthesis throughout the day.

Post-Workout

Consume 20–40g of protein within a few hours of training. The exact timing window is flexible — total daily intake matters more.

Before Bed

A protein-rich snack before sleep (e.g., casein or cottage cheese) can support overnight muscle recovery and growth.

Muscle Gain Protein Targets by Body Weight

Body Weight	Minimum Effective	Recommended	Upper Range
60 kg / 132 lb	96 g	108 g	132 g
75 kg / 165 lb	120 g	135 g	165 g
90 kg / 198 lb	144 g	162 g	198 g
105 kg / 231 lb	168 g	189 g	231 g

Minimum uses 1.6 g/kg, recommended uses 1.8 g/kg, and upper range uses 2.2 g/kg.

When to Use the Higher End

High Training Volume

Use 1.8-2.2 g/kg when you lift 4-6 days per week, train close to failure, or are adding volume during a focused hypertrophy block.

Lean Bulking

If your calorie surplus is small, protein consistency matters more because total energy is not high enough to cover repeated missed protein meals.

Plant-Based Diets

Vegan and mostly plant-based diets may benefit from the upper half of the range due to lower average digestibility and amino acid density.

Cutting While Lifting

If you are trying to gain or keep muscle while losing fat, use the weight-loss or recomp calculators so calorie deficit context is included.

Formula Used for Muscle-Gain Protein

The muscle-gain calculator applies the hypertrophy range to effective body weight, then activity level nudges the recommendation toward the high end when training volume is higher.

Input	Formula	How it is used
Minimum effective	effective body weight in kg × 1.6 g/kg	A strong starting point for most lifters who are eating enough calories.
Recommended	effective body weight in kg × 1.8 g/kg	The default middle target for consistent resistance training.
Upper range	effective body weight in kg × 2.2 g/kg	Most useful for high-volume training, lean bulking, plant-based diets, or cutting while lifting.

Targets above the upper range rarely add muscle-building benefit for healthy lifters who already eat enough total calories.

Worked Example for Muscle Gain

For a 75 kg lifter training four days per week:

1. Minimum: 75 kg × 1.6 g/kg = 120 g/day.
2. Recommended: 75 kg × 1.8 g/kg = 135 g/day.
3. Upper range: 75 kg × 2.2 g/kg = 165 g/day.
4. Across four meals, 135 g/day is roughly 34 g per meal.

A practical target is 135-150 g/day unless appetite, digestion, or calories make that difficult.

When to Use This Calculator

Use this page for hypertrophyBest when lifting progress and muscle gain are the main goal.Use athletes calculator for sport demandsBetter when endurance, team sport, or mixed training changes fueling needs.Use bulking calculator for caloriesBetter when you also need surplus calories and full macros.Use weight-loss calculator while cuttingBetter when you are in a calorie deficit and trying to keep muscle.

Matching Guides

Protein for Muscle GainResearch-backed hypertrophy targets and timing.Protein TimingHow to spread protein across the day.150g Protein Meal PlanA practical high-protein day structure.

Sources reviewed

International Society of Sports Nutrition Position Stand: protein and exercise - Journal of the International Society of Sports Nutrition
Protein supplementation and resistance training meta-analysis - British Journal of Sports Medicine / PubMed
International Society of Sports Nutrition Position Stand: nutrient timing - PubMed

Frequently Asked Questions

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Learn More

Protein Intake for Muscle Gain: What the Research Says →

Covers the 1.6-2.2 g/kg range for hypertrophy, meal distribution, timing, and common muscle protein synthesis myths.

Protein Timing: When to Eat Protein for Best Results →

The science of post-workout timing, pre-sleep protein, and meal distribution across the day.

Pre & Post Workout Nutrition Guide: What to Eat & When →

Evidence-based pre- and post-workout nutrition guidance for protein, carbs, timing, and recovery.

Disclaimer: This calculator provides estimates based on published research. Individual results vary. Consult a registered dietitian or healthcare provider for personalized guidance, especially if you have health conditions.