Calculator Inputs
Results appear above this form after submission.
Protein Visualization
The chart compares daily protein grams across common grams-per-pound factors and marks your selected target.
Formula Used
- Weight in pounds: pounds = kilograms × 2.20462
- Lean body mass: lean pounds = body weight × (1 − body fat % ÷ 100)
- Protein grams: daily protein = basis weight in pounds × protein factor
- Protein calories: protein calories = protein grams × 4
- Per meal: per meal protein = daily protein ÷ meals per day
- Suggested range: low and high range = selected factor ± 0.10 g/lb
| Adjustment Area | Rule Used | Effect on Factor |
|---|---|---|
| Goal Base | Maintenance, fat loss, muscle gain, recomp, or endurance | 0.70 to 1.00 g/lb base |
| Activity | Sedentary through athlete volume | -0.05 to +0.15 g/lb |
| Age | 40+ and 60+ get higher support | +0.05 or +0.10 g/lb |
| Manual Mode | Direct factor entered by the user | 0.30 to 2.00 g/lb |
How to Use This Calculator
- Enter your body weight and choose pounds or kilograms.
- Add age to let the recommendation account for higher protein needs later in life.
- Optional: enter body fat percentage and enable lean mass if you want protein based on lean weight.
- Select your activity level and your main goal.
- Choose Recommended Formula for guided estimates or Manual Factor for a coach-selected grams-per-pound value.
- Enter meals per day to see an even meal-by-meal protein target.
- Optional: add daily calories to estimate how much of total intake comes from protein.
- Press Calculate Protein to view the result block above the form, then use the export buttons for CSV or PDF.
Example Data Table
| Person | Weight | Goal | Activity | Factor | Protein / Day | Meals | Per Meal |
|---|---|---|---|---|---|---|---|
| Desk Worker | 150 lb | Maintenance | Lightly Active | 0.70 g/lb | 105 g | 3 | 35 g |
| Fat Loss Phase | 180 lb | Fat Loss | Moderately Active | 0.95 g/lb | 171 g | 4 | 42.8 g |
| Muscle Gain | 200 lb | Muscle Gain | Very Active | 0.95 g/lb | 190 g | 5 | 38 g |
| Endurance Athlete | 70 kg | Endurance Support | Athlete | 0.90 g/lb | 138.9 g | 4 | 34.7 g |
| Lean-Mass Method | 220 lb, 28% fat | Recomp | Moderately Active | 1.05 g/lb | 166.3 g | 4 | 41.6 g |
FAQs
1. What does protein per pound mean?
It means grams of protein recommended for each pound of body weight. A target of 0.8 g/lb means a 180-pound person aims for about 144 grams daily.
2. Should I use total body weight or lean body mass?
Total weight works well for many people. Lean body mass is often more useful during fat loss, bodybuilding, or when body fat is high and a tighter estimate is preferred.
3. Is more protein always better?
Not always. Higher protein can help satiety and muscle retention, but more is not automatically better once needs are met. Total calories, training, digestion, and food quality still matter.
4. Why does age change the recommendation?
Older adults often benefit from slightly more protein because muscle retention and anabolic response may decline with age. That is why this calculator adds a modest adjustment later in life.
5. How many meals should I spread protein across?
Three to five protein feedings work well for many people. The best number depends on appetite, schedule, training time, and whether larger or smaller meals feel easier to maintain.
6. Can I use this during fat loss?
Yes. Protein is especially useful during fat loss because it supports fullness and helps retain lean mass. Many people use a higher factor when dieting, especially with regular resistance training.
7. Does this calculator replace medical advice?
No. It is an educational estimator. Anyone with kidney disease, clinical nutrition needs, pregnancy, recovery issues, or physician-directed diets should confirm targets with a qualified healthcare professional.
8. What if my coach already gave me a target?
Use the Manual Factor mode. That lets you enter the exact grams-per-pound value from your coach, program, or nutrition plan while still getting meal splits and exportable results.