Protein Calculator

How much protein do you need? More than you are eating. That is not a guess, it is a statistic.

Use this free protein calculator to find your daily protein target in grams from bodyweight. Enter your weight in pounds and get two numbers: a maintenance intake and a higher muscle-gain intake for when you are actually training.

Protein is the one macro where most people are genuinely short. It builds and repairs muscle, keeps you full longer than carbs or fat, and costs your body more energy to digest. It is also the macro that gets replaced by "I had a smoothie."

What This Protein Calculator Does

Calculates a maintenance protein target (0.8 g per pound of bodyweight)
Calculates a muscle-gain target (1.2 g per pound) for people lifting regularly
Gives grams, not vague advice about "getting enough protein"
Works alongside the macro calculator if you are splitting a full calorie budget

How to Use the Protein Calculator

Inputs:

Weight — bodyweight in pounds (kg × 2.205)

Steps:

Enter your bodyweight in pounds
Click Calculate for both targets
Use Maintain if you are sedentary or in a maintenance phase, Gain Muscle if you lift 3+ times a week or are in a fat-loss phase protecting muscle
Divide the target across 3–4 meals — roughly 30–45 g each is easier than one heroic dinner

How the Calculation Works

Maintain (g) = Weight (lb) × 0.8 Gain Muscle (g) = Weight (lb) × 1.2

In metric terms these are about 1.8 g/kg and 2.6 g/kg — the upper end of what research supports for trained people
Research consensus for muscle gain sits around 1.6–2.2 g/kg (0.7–1.0 g/lb); above that, extra protein is mostly expensive fuel
Very overweight individuals should base the target on goal or lean bodyweight, not total weight, or the number gets unrealistic
Protein delivers 4 kcal/g, so 150 g of protein is 600 of your daily calories

Worked Example: 170 lb, lifting four times a week

Maintain: 170 × 0.8 = 136 g/day
Gain Muscle: 170 × 1.2 = 204 g/day
Across 4 meals that is roughly 51 g per meal at the higher target
In food: 6 oz chicken breast (54 g), a cup of Greek yogurt (23 g), 3 eggs (19 g), a scoop of whey (25 g), a cup of lentils (18 g). Getting to 200 g takes planning, not willpower.

Tips (From People Who Have Made These Mistakes)

Spread it out: 20–40 g per meal stimulates muscle protein synthesis better than one giant serving
Cheapest high-protein foods: eggs, canned tuna, cottage cheese, chicken thighs, lentils, whey powder. Protein bars are candy with a résumé
In a calorie deficit, keep protein at the higher number — that is what keeps the weight you lose from being muscle
Plant-based? Add roughly 10% and vary sources, since individual plant proteins are lower in specific amino acids

Frequently Asked Questions

How much protein do I need per day?

For general health, about 0.8 g per pound of bodyweight; for muscle gain or fat loss while training, 1.0–1.2 g per pound. A 160 lb person: 128 g maintenance, 192 g while training hard.

How much protein to build muscle?

Around 1.6–2.2 g per kg (0.7–1.0 g per lb), combined with resistance training and enough total calories. Protein without training builds very little; training without protein builds even less.

Is too much protein bad for you?

For healthy kidneys, intakes up to ~2.5 g/kg show no harm in the research. If you have kidney disease, protein targets must come from your doctor, not a calculator.

How much protein is in one chicken breast?

A 6 oz (170 g) cooked chicken breast has roughly 54 g of protein. Useful anchor: most cooked meat and fish is about 25–30 g of protein per 100 g.

Do I need protein powder?

No — it is just convenient. One scoop is 20–25 g for about 120 calories, which solves the "I cannot eat another chicken breast" problem. Whole food first, powder to fill the gap.

Mini Roast Disclaimer

We roast the number, not you. Although if your protein plan is "the beans in the burrito," the number has notes.

Reality Check

These are per-pound heuristics, not clinical prescriptions. Needs shift with age (older adults need more), training volume, pregnancy, and medical conditions — and kidney disease changes the answer entirely. Total calories and consistent training matter more than squeezing out the last 10 grams.

Protein Calculator

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