How Much Protein to Build Muscle?

How much protein to build muscle? People who lift should eat about 1.4–2.0 g of protein per kilogram of body weight a day. The International Society of Sports Nutrition calls that range sufficient for most exercising people. At 70 kg (154 lb) it works out to 98–140 g (ISSN position stand, 2017).

How much protein do I need to build muscle?

Multiply your weight in kilograms by 1.4 for the low end and by 2.0 for the high end (the ISSN position stand). The ISSN describes it as a minimum recommended amount, so it isn’t a cap. The table adds the 1.6 g/kg middle and the 0.8 g/kg figure from the US Recommended Dietary Allowance for comparison. For the general-population version of this sum, see how to calculate protein intake.

Body weight	0.8 g/kg (RDA)	1.4 g/kg	1.6 g/kg	2.0 g/kg
60 kg (132 lb)	48 g	84 g	96 g	120 g
70 kg (154 lb)	56 g	98 g	112 g	140 g
80 kg (176 lb)	64 g	112 g	128 g	160 g
90 kg (198 lb)	72 g	126 g	144 g	180 g
100 kg (220 lb)	80 g	140 g	160 g	200 g

The RDA column is there because 0.8 g/kg is the minimum intake estimated from nitrogen balance studies. It was set to avoid deficiency, not to build muscle. The 2025–2030 Dietary Guidelines set 1.2–1.6 g/kg for adults in general, so a lifter starts near the top of that range and moves up. How much protein should I eat a day covers the general range, and the dietary guidelines on protein intake covers how it changed from the 0.8 g/kg era.

Inside the 1.4–2.0 range the ISSN offers no way to pick a spot, so the pick is mine. I start at 1.6 g/kg and move only if two weeks of training and logging say so. Then I stop fiddling. When you eat less than you burn, I lean toward 2.0 g/kg. That is my rule of thumb. The ISSN only says that needs may run higher when calories are restricted.

To turn your own weight into grams, use the protein calculator. It works within the 1.2–1.6 g/kg Dietary Guidelines range, so for 1.8 or 2.0 g/kg use the table above.

Women who don’t lift fall under the general range instead, which daily protein intake for women works out at typical weights.

Does more protein keep building more muscle?

Probably not past about 1.6 g/kg, and the evidence is soft. A meta-analysis of 49 trials with 1,863 people found that protein supplements stopped adding fat-free mass once total intake passed 1.62 g/kg a day. The trials ran six weeks or longer and everyone trained at least twice a week, so the finding says nothing about protein without training.

Effects were modest. Supplements added 0.30 kg of fat-free mass on average and 2.49 kg to the one-repetition-max lift. The benefit shrank with age and was larger in people who already trained.

The break point needs a careful read. The authors report it at 1.62 g/kg with a 95% range of 1.03–2.20 g/kg, and the fit was not statistically significant (p = 0.079), so the plateau is an estimate with wide error, not a measured edge. The 1.62 figure sits in the middle of a wide band, and the band’s top end, 2.2 g/kg, is the ISSN’s 2.0 with a little room on top.

So I use the ISSN range with 1.6 g/kg as the default. Going from 1.6 to 2.0 g/kg at 70 kg adds 28 g a day, about 87 g of braised chicken. The meta-analysis found no extra fat-free mass from supplements up there.

How much protein should I eat per meal to build muscle?

Aim for 0.25 g per kg of body weight at each main meal, or 20–40 g, as the ISSN position stand puts it. It suggests no more than 3–4 hours between meals, and at 70 kg 0.25 g/kg is only 17.5 g, so the 20 g floor is the one that binds.

Spread 112 g over three meals and each carries about 37 g. Over four meals it is 28 g, and both splits sit inside the 20–40 g band.

Eating the whole day’s protein at dinner doesn’t fit that band, and it is the first pattern I’d change.

What does a muscle-building day of protein look like?

Three ordinary meals reach the target. The table builds a day for a 70 kg lifter at 1.6 g/kg. Protein and energy come from the USDA record linked in each row.

Meal	Food and grams	Protein	Energy
Breakfast	3 large eggs, 150.9 g, and Greek yogurt, nonfat, 156 g	34.8 g	317 kcal
Lunch	Braised chicken breast, 120 g	38.5 g	199 kcal
Dinner	Firm tofu, 126 g, and boiled lentils, 198 g	39.7 g	411 kcal
Total		113.0 g	927 kcal

That’s 113.0 g of protein and 927 kcal, so rice, vegetables, fruit and oil still have room in the day. Protein powder is a convenience. One 32 g serving of whey-based powder gives 25.0 g of protein for 113 kcal. Powder or chicken, the grams add up the same way.

Is eating this much protein safe?

For healthy adults who train, the ISSN found no controlled evidence that higher protein intakes harm health. Its review looked at kidney and liver markers in controlled studies.

Some people sit outside that finding. If you have kidney disease, your doctor sets your protein target, and the table above doesn’t apply. Pregnancy and breastfeeding change the figures too, and so does being under 18, which this guide doesn’t cover.

Pick the row of the first table that matches your weight. Log three normal days and weigh the foods that carry the protein: meat, fish, yogurt, tofu, beans. Compare your average with the number. More than a fifth under? Add one serving to the meal with the smallest gap rather than raising the target.

Calsa shows your protein beside your calories for each meal, so the three-day check is quick.