Protein Intake Calculator
Get a daily protein target matched to your weight and goal.
How to use
- Enter your weight.
- Pick your goal.
- Click Calculate to see your daily protein target.
For information only — not medical advice. Consult a healthcare professional for personal guidance.
What Is a Protein Intake Calculator?
Protein recommendations come in grams per kilogram of body weight — which is useless until someone does the multiplication for your actual body and goal. This calculator does exactly that: enter your weight, choose your goal, and it returns your daily protein target in grams. The three goal levels built in reflect mainstream nutrition science: about 0.8 g per kg for general health, 1.6 g per kg to protect muscle while losing fat, and 2.2 g per kg to maximize muscle building.
Protein does jobs no other nutrient can substitute: it supplies the amino acids for muscle, enzymes, immune proteins, hair, and skin, and it is the most satiating macronutrient, which is why higher-protein diets consistently make calorie control easier. Intake needs scale with both body size and ambition — a sedentary adult preventing deficiency and a lifter building muscle are solving genuinely different problems.
How to Use the Protein Intake Calculator
- Enter your body weight in kilograms or pounds.
- Select your goal: general health (0.8 g/kg), lose fat while keeping muscle (1.6 g/kg), or build muscle (2.2 g/kg).
- Click Calculate to see your daily protein target in grams.
- Divide the total across your meals — roughly equal portions at three or four meals is a practical pattern.
Where the Numbers Come From
The 0.8 g/kg figure is the Recommended Dietary Allowance — the minimum estimated to prevent deficiency in nearly all healthy adults, not an optimum for active people. Sports nutrition research, including large meta-analyses, finds muscle-building benefits rising up to about 1.6 g/kg, with the 2.2 g/kg level serving as a safe upper target often used during aggressive dieting, when higher protein most strongly defends lean mass. Older adults may also benefit from intakes above the RDA, since aging muscle responds less sensitively to protein.
Practical Ways to Hit Your Target
- Anchor each meal: eggs, Greek yogurt, or a protein shake at breakfast fixes the meal most people under-protein.
- Know your workhorses — roughly 30 g of protein per 120–150 g cooked chicken, fish, or lean beef; ~20 g per cup of Greek yogurt; ~25 g per scoop of whey.
- Plant-based eaters should lean on variety (legumes plus grains across the day) and may benefit from aiming at the higher end of their range.
Can I eat too much protein?
For healthy kidneys, intakes up to and beyond 2.2 g/kg have been studied for years without evidence of harm — the "protein damages kidneys" concern applies mainly to people with existing kidney disease, who should follow medical advice. The practical downsides of very high protein are mundane: cost, monotony, and crowding out fiber and other nutrients.
Does protein timing matter, or just the daily total?
The daily total is the main event — it explains the large majority of results. Distribution is a useful refinement: spreading protein across three or four meals at roughly 0.4 g/kg each appears to make slightly better use of it for muscle protein synthesis than loading it all into one meal. The old "30-minute anabolic window" is largely a myth for people eating enough overall.
Should protein be based on total weight or lean mass?
Per-kilogram-of-total-weight is the standard, simplest method, and it works well for most body compositions. For people with obesity, total-weight targets can overshoot needs substantially; in that case, basing intake on goal weight or lean body mass gives a more realistic number. Athletes and dieters often use the lean-mass approach for precision.
Do I need protein powder to reach my target?
No — powder is convenience, not magic; it is simply food (usually whey, a milk protein) in a cheap, measurable form. Plenty of people hit 1.6–2.2 g/kg from meals alone. A shake earns its place when appetite, time, or calorie limits make whole food impractical — for example, reaching a high target inside a fat-loss calorie budget.