How Much Protein to Build Muscle? Check Your Intake
How much protein to build muscle? About 1.6 g per kg (0.7 g per lb) a day; up to 2.2 g/kg covers nearly everyone. Enter your numbers to check your intake.
Protein already on target? Then something else is stalling you. Find out what.
Rough is fine: a palm of meat or fish ≈ 25–30 g, a scoop of whey ≈ 25 g.
Enter your bodyweight and a typical day’s protein to see where you stand.
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To build muscle, eat about 1.6 g of protein per kilogram of bodyweight a day (0.7 g per pound). That is where the largest meta-analysis on the question found extra protein stopped adding muscle, and 2.2 g/kg (1 g per pound) covers nearly everyone. Enter your bodyweight and a normal day's protein above to see where you stand.
How much protein do I need per day to build muscle?
About 1.6 g per kg of bodyweight a day. Across 49 trials with 1,863 people who lifted, protein beyond 1.62 g/kg a day added no more fat-free mass (Morton et al., 2018). The upper end of that estimate's 95% confidence range was 2.2 g/kg, so eating up to 2.2 covers nearly everyone.
| Bodyweight | 1.6 g/kg | 2.2 g/kg |
|---|---|---|
| 60 kg (132 lb) | 96 g | 132 g |
| 70 kg (154 lb) | 112 g | 154 g |
| 80 kg (176 lb) | 128 g | 176 g |
| 90 kg (198 lb) | 144 g | 198 g |
| 100 kg (220 lb) | 160 g | 220 g |
A handy shortcut: at the top of the range, your daily grams equal your bodyweight in pounds.
Does more protein build more muscle?
Only up to a point. In 74 trials, eating more protein gave small extra gains in lean mass for people who lifted, and for adults under 65 the effect showed up at 1.6 g/kg or more (Nunes et al., 2022). Past about 2.2 g/kg, there is no sign of further gains.
Very high intakes are not harmful for healthy lifters, just wasted. Trained men and women eating 4.4 g/kg for eight weeks saw no change in fat mass or fat-free mass (Antonio et al., 2014).
How much protein should you eat per meal?
About 0.25 g per kg, or 20–40 g, every three to four hours, according to the ISSN position stand. Four meals of roughly 0.4 g/kg reach the 1.6 g/kg daily target (Schoenfeld & Aragon, 2018). See how much protein per meal for your numbers.
Do you need more protein when cutting?
Yes, a little more. The ISSN suggests 2.3–3.1 g/kg a day to keep lean mass while losing fat in trained lifters, because a calorie deficit makes muscle easier to lose (ISSN). When you are maintaining or bulking, 1.6–2.2 g/kg is enough.
What if your protein is already enough?
Then protein is not your bottleneck, and adding more will not restart growth. It is a common trap: lifters keep raising protein while the real limit is effort, weekly sets or the calorie surplus. The full diagnosis checks those alongside food.
FAQ
Is 100 g of protein enough to build muscle?
For someone up to about 62 kg (137 lb), yes: that is 1.6 g/kg. Heavier lifters need more, about 0.7 g per pound of bodyweight.
Do I need protein powder to build muscle?
No. Powder is a convenient way to hit the target, not a requirement; whole foods work the same when the daily total is there.
Should I eat the same protein on rest days?
Yes. Muscle keeps building for at least a day after training, so keep the daily target on rest days too.
Written and maintained by LiftDecode. Training and nutrition education for healthy adults, not medical advice — if you have a health condition or an injury, talk to a professional who can examine you.