For most healthy adults who lift, about 1.6 grams of protein per kilogram of bodyweight per day is a strong evidence-based target for building muscle. A practical working range is 1.6–2.2 g/kg/day, or approximately 0.7–1.0 g per pound. The higher end creates flexibility; it is not automatically more anabolic.
Training supplies the growth stimulus. Protein helps provide the amino acids needed to repair and build tissue, but it cannot compensate for an ineffective program, inadequate total energy, or poor recovery.
Calculate your daily protein target
Multiply bodyweight in kilograms by 1.6 for the central target, or by 1.6 and 2.2 for the broader range.
| Bodyweight | About 1.6 g/kg | Range of 1.6–2.2 g/kg |
|---|---|---|
| 60 kg / 132 lb | 96 g | 96–132 g |
| 70 kg / 154 lb | 112 g | 112–154 g |
| 80 kg / 176 lb | 128 g | 128–176 g |
| 90 kg / 198 lb | 144 g | 144–198 g |
| 100 kg / 220 lb | 160 g | 160–220 g |
Do not treat the calculated number as a daily pass/fail test. A target of 145 g does not make 142 g meaningfully inadequate. A repeatable range is often easier to follow and more honest about normal variation.
If protein is the only nutrition variable you want to track, compare that approach with calorie, macro, and protein-only tracking.
Why 1.6–2.2 g/kg?
A large meta-analysis of resistance-training studies found that protein supplementation improved gains in fat-free mass and strength, with the modeled benefit for fat-free mass leveling around 1.62 g/kg/day. That value is a statistical estimate across studies, not a switch that turns muscle growth off below it or guarantees more growth above it.
The upper end of 2.2 g/kg/day is a practical buffer. It can accommodate individual preference, imperfect tracking, different food quality, and dieting phases. It should not crowd out carbohydrate, fats, fruits, vegetables, or enough total calories to train well.
The appropriate target also depends on what you already eat. Moving from 0.8 to 1.6 g/kg is likely more consequential than moving from 1.8 to 2.2 g/kg.
Should you use current or goal bodyweight?
The research-based calculation normally uses current bodyweight. For someone carrying substantially more body fat than their target, however, current weight can produce an unnecessarily large number. Using goal weight or an adjusted weight can be a practical adherence heuristic.
That shortcut is not directly validated by the muscle-gain meta-analysis, so present it as an estimate rather than a superior formula. For example, a 240 lb lifter aiming for 200 lb could begin near the target calculated from 200 lb, observe satiety, recovery, and training, and adjust with a registered dietitian if needed.
People who are very lean, in a prolonged deficit, or managing a medical condition need more individualized advice than a generic calculator provides.
Distribute protein across repeatable meals
Daily total matters most, but spreading protein across the day gives you several opportunities to stimulate muscle protein synthesis.
A useful model is three to five protein-containing meals, with roughly 0.3–0.4 g/kg per meal. A review proposed about 0.4 g/kg across at least four meals as a way to reach 1.6 g/kg/day.
For an 80 kg lifter, that is approximately 25–32 g at a meal. It is a planning aid, not a maximum amount the body can digest or use. A meal containing 50 g is not wasted, and you do not need to wake during the night to maintain a perfect schedule.
If you are deciding whether the post-workout meal is urgent, read protein timing after workouts. The short answer is that total daily intake and the meals surrounding training matter more than a narrow countdown.
Build the target from foods you can repeat
Protein can come from:
- meat, poultry, and fish;
- eggs and dairy;
- soy foods such as tofu, tempeh, and edamame;
- legumes, grains, nuts, and seeds; and
- protein powders when convenience helps.
Plant-based diets can support muscle growth. Because individual plant foods vary in essential amino-acid content and digestibility, use varied sources and consider a slightly larger serving or a blended protein source. Total dietary pattern matters more than labeling one food “complete” and everything else inferior.
Protein powder is food in a convenient format, not a requirement. Use it when it makes the target cheaper, easier, or more comfortable—not because shakes build a different kind of muscle.
Adjust protein for cutting and gaining
During a gaining phase, the central 1.6 g/kg target is usually sufficient when energy intake and training are appropriate. Extra protein above the useful range often displaces carbohydrate or simply adds calories without a clear hypertrophy advantage. Pair the target with a controlled lean-bulk calorie surplus rather than assuming protein alone drives the gain.
During a cut, higher protein can support satiety and lean-mass retention. Some sports-nutrition guidance uses higher targets for lean resistance-trained athletes in energy restriction, often expressed relative to fat-free mass. Do not translate those specialized recommendations into a blanket 3 g/kg bodyweight rule for everyone dieting.
The deficit size, training, starting body composition, and duration of the cut all affect risk. See cutting mistakes that can cost muscle for the wider picture.
More protein is not always better
Once intake is adequate, the next gram may be less valuable than:
- enough carbohydrate to support hard training;
- dietary fat and essential fatty acids;
- fiber and micronutrient-rich foods;
- adequate total energy; or
- a meal pattern you can sustain.
Do not use a large protein target to moralize food choices or create an unnecessarily restrictive diet. The purpose is to support training, not turn every meal into a supplement calculation.
Medical considerations
These ranges are intended for generally healthy adults. People with chronic kidney disease, kidney failure, or another condition requiring medical nutrition therapy should not adopt a high-protein target from a fitness article. NIDDK recommends working with a qualified clinician or renal dietitian because protein needs can change with kidney function and dialysis status.
Pregnancy, adolescence, eating-disorder history, and other clinical circumstances also warrant individualized guidance.
Frequently asked questions
Is 1 gram per pound necessary to build muscle?
No. It fits within the practical upper range, but many lifters can maximize or nearly maximize results with less. Approximately 0.7 g/lb corresponds to 1.6 g/kg.
Can I eat all my protein in two meals?
You can still digest and use it, but three to five protein-containing meals may distribute muscle-building opportunities more evenly and can make a large daily target easier to reach.
Does protein timing matter more than total protein?
No. Total daily intake is the first priority. Timing can refine an already adequate diet, especially around fasted training, but it is not a substitute for reaching the daily target.
Do I need protein powder?
No. It is a convenient option when whole-food meals do not fit your schedule, appetite, budget, or dietary preferences.
The practical takeaway
Start near 1.6 g/kg/day, use up to 2.2 g/kg/day when preference or context supports it, and distribute the total across meals you can repeat. Then focus on progressive training, sufficient energy, and recovery. Protein should simplify the plan, not dominate it.
Sources
- A Systematic Review, Meta-Analysis and Meta-Regression of Protein Supplementation and Resistance Training
- International Society of Sports Nutrition Position Stand: Protein and Exercise
- How Much Protein Can the Body Use in a Single Meal for Muscle Building?
- NIDDK: Healthy Eating for Adults With Chronic Kidney Disease