Select Goal:
Enter Weight:
Result:
Pick a goal and enter weight above. Out comes a daily protein target in grams, tuned to whether the plan is holding steady, building muscle, or dropping fat. Three goals, one weight field, a number that actually fits the plan instead of a flat 56 grams pulled from a generic label.
Sedentary adults often do fine on 56 to 90 grams a day. Anyone lifting weights or cutting calories usually needs a good deal more, sometimes north of 150 grams. Body weight and goal decide almost all of that gap.
What Counts As Daily Protein Intake?
Daily protein intake is the total grams of protein eaten across a day, measured against body weight rather than a flat number for everyone. Muscle repair, hormone production, and enzyme function all draw from this pool, and a shortfall shows up first in recovery, not in the mirror.
Dietitians size protein per kilogram of bodyweight because a 55 kg person and a 95 kg person clearly don’t need the same gram count. Goal shifts the multiplier on top of that. Someone maintaining weight sits near the low end. Someone in a calorie deficit trying to hang onto muscle sits well above it.
How to Use the Protein Intake Calculator
Two fields. Thirty seconds, maybe less.
- Choose a goal, maintain weight, build muscle, or fat loss.
- Pick a weight unit, kilograms or pounds.
- Type in current weight.
- Hit Calculate.
- Read the daily gram target underneath.
Nothing typed here gets stored. Run it again after a goal change or a few kilos lost, and the number adjusts with it.
Daily Protein Needs by Goal
Goal | Protein Range | Why |
Maintain Weight | 0.8–1.2 g/kg | Covers repair and basic tissue upkeep |
Build Muscle | 1.6–2.2 g/kg | Supports muscle protein synthesis under training load |
Fat Loss | 1.6–2.4 g/kg | Protects lean mass during a calorie deficit |
A 70 kg person maintaining weight lands somewhere around 56 to 84 grams. Shift that same 70 kg toward muscle gain, and the target climbs to 112 through 154 grams. Push toward fat loss instead, and it runs 112 to 168 grams, higher than muscle gain despite fewer calories overall, because a deficit puts muscle at risk that extra protein helps guard.
Two people can share a goal and still land in different corners of a range, which is where macro calculator comes in, splitting the rest of the day’s calories around whatever protein number lands here.
How Protein Intake Is Calculated
Every goal below runs off the same input, bodyweight in kilograms, multiplied by a gram range that shifts with training and calorie intake.
Maintain weight: multiply bodyweight by 0.8 to 1.2 Build muscle: multiply bodyweight by 1.6 to 2.2 Fat loss: multiply bodyweight by 1.6 to 2.4
A meta-analysis spanning 49 studies and close to 1,900 participants found muscle gains kept climbing up to roughly 1.6 g/kg before flattening out, which is exactly why that number marks the floor, not the ceiling, for the build-muscle range above.
Take someone at 85 kg. Maintenance sits at 68 to 102 grams. Muscle building pushes that to 136 through 187 grams. Fat loss lands close, 136 to 204 grams, since the deficit itself raises the amino acid demand almost as much as training does.
Factors That Change Protein Needs
Bodyweight and goal set the baseline. Four things move the number from there.
- Training frequency raises protein needs because resistance work creates more muscle breakdown to repair.
- Age matters past 50 or so, since older muscle responds less efficiently to the same protein dose, a pattern researchers call anabolic resistance.
- Calorie deficit size pushes protein toward the top of its range, since a bigger gap between intake and burn puts more muscle at risk.
- Body composition shifts the real target too. Someone carrying more fat relative to muscle needs less total protein than the bodyweight number alone suggests.
None of these factors override body weight and goal. They nudge the final number up or down within the range the table above already covers.
Hitting Your Daily Protein Target
A gram target on a screen means nothing until it turns into actual meals. Splitting it across three or four sittings works better than one large protein meal at night.
Chicken breast carries about 24 grams per 3 ounces. Salmon runs close behind at 22 to 25. A cup of plain yogurt adds 10 more, and two eggs bring roughly 12. Stack a few of these across breakfast, lunch, and dinner, and most gram targets close without much counting at all.
Research points to 20 to 40 grams per meal as the sweet spot for triggering muscle repair, so spreading protein evenly beats saving it all for dinner. Anyone training in the morning benefits from getting a chunk of that target in early, ideally within a couple hours of the session.
Once daily protein locks in, the TDEE calculator fills in the calorie side of the equation, so protein, carbs, and fat all sit inside a number that actually matches the goal.
Where the Protein Formula Falls Short
Bodyweight-based protein math skips lean mass entirely, and that’s its biggest blind spot. Two people at the same total weight but very different body fat percentages get handed the same gram target, even though the leaner one arguably needs more per kilogram of actual muscle tissue.
Kidney disease, liver disease, and certain metabolic conditions change protein tolerance in ways no bodyweight formula accounts for. Anyone managing one of those conditions needs a number from a doctor or dietitian, not a calculator.
Extremely lean athletes and people carrying significant excess weight both sit outside what these ranges were built for. The math still works as a starting point either way, just with a wider margin for adjustment than average.
FAQs
How much protein do I need per day?
Daily protein needs run from 0.8 to 2.4 grams per kilogram of bodyweight, depending on goal. Maintenance sits lowest, muscle building and fat loss both sit higher.
Is more protein always better for muscle gain?
No. Gains plateau near 1.6 grams per kilogram in most research. Eating well above that range adds little extra muscle beyond what that number already supports.
Does fat loss really need more protein than muscle gain?
Often, yes. A calorie deficit raises the risk of muscle loss, so fat loss ranges run slightly higher than muscle gain ranges to protect lean tissue during the cut.
Can I get too much protein?
Healthy adults tolerate high protein intake well, with no confirmed upper safety limit in current research. Kidney or liver conditions change that answer, so those cases need medical guidance first.
Does age change how much protein I need?
Yes. Adults past roughly 50 often need protein at the higher end of their goal range, since aging muscle responds less efficiently to the same gram amount.