How Much Protein Do You Need Per Day?

Why protein needs vary

Protein builds and repairs muscle, keeps you full, and has the highest thermic effect of the three macronutrients, meaning your body burns more energy digesting it. How much you need depends on what you are asking your body to do. Someone sedentary who just wants to stay healthy needs far less than someone training hard to build muscle or dieting to lose fat without losing muscle. That is why the answer is a range keyed to your goal and your body weight, rather than a single number for everyone.

How much protein per day, by goal

For general health, 0.8 to 1.0 grams per kilogram of body weight is enough. Active people who want to build or keep muscle do better at 1.6 to 2.2 g/kg. When cutting on a calorie deficit, going higher, around 2.0 to 2.6 g/kg of lean mass, helps protect muscle while you lose fat. Older adults benefit from the higher end to counter age-related muscle loss. The protein calculator turns your goal and weight into a daily gram range and splits it across meals.

The protein formula

Multiply your body weight in kilograms by the factor for your goal. If you know your body fat percentage, base the number on lean mass instead, which is more precise at higher body fat because muscle, not fat, drives protein needs. Then divide across three to five meals to make a big daily number manageable. Ranges and sources are on the methodology page.

Worked example

Protein ranges by goal

Factors that change your protein target

• Body weight or lean mass: the target scales with size; lean mass is more precise at higher body fat.
• Goal: cutting sits at the top of the range, general health near the bottom.
• Training status: hard resistance training raises needs.
• Age: older adults benefit from the higher end.
• Total calories: in a deep deficit, protein needs edge up because some is used for energy.

How to hit your target

Divide protein across three to five meals of 25 to 45 grams each. Whole foods like chicken, fish, eggs, dairy, legumes, and tofu can cover most targets, with protein powder as a convenient extra when whole-food protein is hard to fit. Aim for a protein source at every meal, and front-load it earlier in the day if evenings run short. To set your full plate, use the macro calculator for carbs and fat, and if you are recomposing, see how body recomposition works.

Protein sources and a sample day

Hitting a target is easier when you know what protein looks like on a plate. Roughly, 100 grams of cooked chicken breast provides about 31 grams of protein, a large egg about 6 grams, 150 grams of Greek yogurt around 15 grams, a cup of lentils about 18 grams, a 100-gram can of tuna about 25 grams, and a typical scoop of whey around 24 grams. Fish, lean beef, tofu, and cottage cheese round out the options, and combining plant sources across the day covers the full range of amino acids for those eating less animal protein.

Here is how 152 grams, the midpoint for our 80 kg example, might come together across four meals. Breakfast: two eggs plus a pot of Greek yogurt, about 27 grams. Lunch: a 150-gram chicken breast with rice and vegetables, about 46 grams. Snack: a whey shake, about 24 grams. Dinner: a salmon fillet with potatoes, about 40 grams. That is roughly 137 grams from four meals, and a handful of nuts or a glass of milk closes the small gap. Building each meal around a protein source, rather than treating protein as an afterthought, is the single habit that makes a daily target feel effortless. If evenings tend to run short, front-load protein earlier so you are not scrambling to eat 60 grams at 9 pm. Whole foods should carry most of the load, with powder as a convenient top-up rather than the foundation.

The bottom line: protein needs scale with your body weight and your goal, so there is no single number that fits everyone. General health sits near 0.8 to 1.0 g/kg, active people and muscle building at 1.6 to 2.2 g/kg, and cutting at the top of the range to protect muscle. Build each meal around a protein source, spread the total across the day, and lean on whole foods with powder as a convenient top-up. Hit the daily total consistently and the exact timing barely matters; miss it repeatedly and no amount of clever timing makes up the gap.

Common mistakes

• Under-eating protein while cutting. A deficit is when protein matters most, yet it is often the first thing to slip.
• Fixating on timing over total. The daily total matters far more than the exact window around a workout.
• Assuming more is always better. Beyond the ranges here, extra protein adds calories without extra muscle.
• Relying only on powder. Whole foods bring other nutrients; powder is a convenience, not a requirement.

Limitations

These ranges come from studies of healthy, active adults, so individual needs vary with age, training status, and overall calorie intake. The tool estimates a target from body weight or lean mass; it does not measure how much protein you actually absorb, and it cannot account for kidney disease or other conditions that change protein handling. Treat the range as a well-supported guideline and adjust with a professional if you have a relevant condition. See our health disclaimer.

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