How Much Protein Do I Need to Build Muscle?

By the CaloriesSnap Editorial Team · Updated August 26, 2026 · Our methodology

Quick answer: For building muscle, aim for about 1.6 g of protein per kg of body weight per day (≈0.7 g per lb), and up to 2.2 g/kg if you want a safety margin. That works out to roughly 110–155 g/day for a 70 kg person. Protein only builds muscle when it's paired with progressive strength training and enough total calories.

What the research actually says

The most cited analysis on this question (Morton et al., 2018) pooled 49 studies with 1,800+ participants who lifted weights. Extra protein clearly helped muscle and strength gains, but the benefit levelled off at about 1.6 g/kg/day. Because people vary, the authors suggested up to 2.2 g/kg for anyone who wants to be sure they've covered their needs. The International Society of Sports Nutrition gives a similar recommendation: 1.4–2.0 g/kg/day for most exercising people.

Your muscle-building protein target by body weight

Body weight	1.6 g/kg (effective)	2.2 g/kg (upper)	≈ per meal (4 meals)
55 kg (121 lb)	88 g	121 g	22–30 g
65 kg (143 lb)	104 g	143 g	26–36 g
75 kg (165 lb)	120 g	165 g	30–41 g
85 kg (187 lb)	136 g	187 g	34–47 g
95 kg (209 lb)	152 g	209 g	38–52 g

Muscle-gain protein (g/day) = body weight (kg) × 1.6 to 2.2

A worked example

Marcus is 78 kg and has been lifting for one year. He wants to add muscle with minimal fat gain.

Protein: 78 × 1.8 g/kg = ~140 g/day (a comfortable mid-range target)
Meals: 4 meals of ~35 g protein each
Calories: a small surplus of roughly 200–300 kcal/day above maintenance (see deficit vs surplus)
Training: 3–5 strength sessions a week, gradually adding weight or reps

With this setup, a realistic rate for an intermediate lifter is roughly 0.25–0.5 kg (0.5–1 lb) of body weight per month, a good share of it muscle. Beginners often gain faster; advanced lifters gain more slowly.

Calculate your exact muscle-gain protein

Choose "build muscle" as your goal and get a personal daily range with a per-meal split.

Open the Protein Calculator →

Three things matter more than protein timing

Training stimulus. Muscle grows in response to challenging resistance training. Without it, extra protein is just extra calories.
Total daily protein. Hitting your daily number consistently beats chasing a "30-minute anabolic window".
Enough energy. Building muscle in a big calorie deficit is hard. A small surplus, or eating at maintenance with high protein, works better for most people. Use the Calorie Surplus Calculator to find your number.

Protein myths, busted

Myth: "You need 1 g per pound or you won't grow." One gram per pound (2.2 g/kg) is the top of the useful range. Most people get nearly all the benefit at 0.7 g/lb.

Myth: "Your body can only absorb 30 g per meal." Your gut absorbs nearly all the protein you eat. Larger servings are simply used over a longer period. More in our guide on protein per meal.

Myth: "Plant protein can't build muscle." It can, when total intake is adequate. Soy protein performs similarly to animal protein in many studies. Mix sources and aim a little higher.

Best foods for muscle-building protein

Animal: chicken, turkey, lean beef, fish, eggs, Greek yogurt, cottage cheese, milk, whey
Plant: tofu, tempeh, edamame, seitan, lentils, chickpeas, beans, soy milk, pea or soy protein powder
Leucine-rich choices (dairy, eggs, meat, soy) are especially good at triggering muscle protein synthesis

Eating plant-based? Our Vegan Protein Calculator adjusts the target for plant proteins.

Frequently asked questions

How much protein do I need to build muscle?

Most research shows muscle gains level off at around 1.6 g of protein per kg of body weight per day (about 0.7 g per lb). Aiming for 1.6–2.2 g/kg gives a safety margin, especially for experienced lifters or people building muscle while in a calorie deficit.

Is 1 gram of protein per pound of body weight necessary?

No. One gram per pound (about 2.2 g/kg) is the top of the useful range, not a requirement. Most people get nearly all the muscle-building benefit at about 0.7 g per pound (1.6 g/kg). The higher target can help during aggressive fat loss or if you prefer a buffer.

Do I need to drink a protein shake right after my workout?

No. Total daily protein matters far more than exact timing. Eating a protein-containing meal within a few hours before or after training is enough for most people. A shake is simply a convenient way to reach your daily total.

Can I build muscle on a vegan or vegetarian diet?

Yes. Plant proteins work well when total intake is sufficient. Many experts suggest aiming toward the upper part of the range (around 1.8–2.0 g/kg) and combining sources such as soy, lentils, beans, seitan, and grains to cover all essential amino acids.

Sources

This article is for general education and is not medical advice. Protein needs vary with health status, kidney function, and medications. Consult a qualified healthcare professional or registered dietitian before making significant dietary changes. See our medical review policy and disclaimer.