Short answer: To build muscle, an adult who trains regularly needs about 0.7–1 gram of protein per pound of bodyweight per day (1.6–2.2 g/kg) — the range most sports nutrition researchers and the International Society of Sports Nutrition (ISSN) converge on. At 154 lb (70 kg), that's 112–154 grams of protein a day, split across 3–4 meals of 25–40 grams each. Going above roughly 1 g/lb doesn't produce extra muscle growth for most people — the excess is just used as energy.

How much protein you need is one of the most common questions in fitness, and the answer has stayed remarkably stable: a range of 0.7–1 g per pound of bodyweight has held as the consensus in sports nutrition for over a decade, regardless of whether someone trains for strength, hypertrophy, or endurance.

The confusion usually comes from mixing up different goals and different units — grams per kilogram, grams per pound, percentage of total calories. Below is how to calculate your exact number instead of relying on vague advice like "eat more protein."

The formula: how much protein you specifically need

Take your bodyweight in pounds and multiply by 0.7–1 (or bodyweight in kilograms times 1.6–2.2). The lower end fits less intense training, 2–3 sessions a week; the higher end fits strength training 4+ times a week or a calorie deficit, when the body needs extra protection against muscle breakdown.

Bodyweight	Daily protein (0.7–1 g/lb)
130 lb (59 kg)	91–130 g
154 lb (70 kg)	108–154 g
176 lb (80 kg)	123–176 g
200 lb (91 kg)	140–200 g

For someone carrying significant excess body fat, it's better to calculate from a target or lean bodyweight rather than current total weight — otherwise the number comes out inflated without any extra benefit for muscle.

Why this range, not "more is always better"

Muscle protein synthesis after training has an upper limit — the body can't use unlimited protein to build muscle in a single day. Studies comparing different protein doses in people who train consistently show no additional strength or size benefit above roughly 0.8–1 g per pound of bodyweight.

Protein above that range isn't harmful to healthy kidneys, but it doesn't speed up muscle growth either — it just gets used as an energy source, like any other calories.

How to spread protein through the day

• 3–4 meals of 25–40 grams of protein each is more effective for muscle protein synthesis than one large 100+ gram meal.
• 20–40 grams of protein within a couple of hours after a strength session supports recovery, though the "anabolic window" is wider than commonly believed — total daily intake matters more than exact timing.
• The protein source (meat, fish, eggs, dairy, legumes, protein powder) matters less than hitting your total daily amount.

Do you need protein powder?

Protein powder is simply a convenient protein source, not a separate category of nutrition with special properties. If you can hit your target through food, a supplement isn't necessary; if fitting enough protein into your day through whole food is logistically hard, powder makes it easier without any loss of effectiveness.

Mistakes people make calculating protein needs

• Calculating from total bodyweight when carrying significant excess fat — this overstates real protein needs.
• Eating one large protein-heavy meal in the evening instead of spreading intake across the day.
• Skipping protein on rest days — muscle recovers on non-training days too, so protein needs don't drop.
• Using a percentage-of-calories target instead of converting to grams per pound — on a low-calorie diet, percentage-based targets understate real protein needs.

Frequently asked questions

• How much protein do I need per day to build muscle? About 0.7–1 gram per pound of bodyweight (1.6–2.2 g/kg) — for example, 108–154 grams at 154 lb.
• Is it harmful to eat more than 1 g of protein per pound? Not harmful for healthy people, but it doesn't speed up muscle growth — the excess is used as calories.
• Do you need to eat protein right after a workout? It helps to eat it within a few hours, but total daily protein intake matters more than exact timing.
• Does protein need change while cutting calories? Yes — during a calorie deficit, it's worth staying at the upper end of the range (around 1 g/lb) to protect muscle from breakdown.
• Can you get all your protein from plant sources? Yes, with a variety of sources (legumes, soy, grains) and attention to total intake — vegans sometimes need 10–20% more due to the less complete amino acid profile of individual plant foods.
• How much protein can the body use in one meal? Roughly 25–40 grams per meal, depending on bodyweight, for muscle protein synthesis — larger portions aren't wasted, but the per-gram effectiveness drops off.

If you're a coach and want to build protein calculations and meal planning into a program for your clients, create a course on FitSpace. See example programs on the authors page.