Daily Protein Intake Calculator
Find out how much protein you really need each day to support your goals — whether that's general health, building muscle, losing fat, or training as an athlete. Get minimum, recommended, and optimal targets in grams plus food-equivalent examples.
Your Daily Protein Targets
Food Equivalents (recommended target)
That's roughly:
How much protein do you really need?
The RDA is 0.8 g/kg of bodyweight — but that's the bare minimum to prevent deficiency, not the amount that's optimal for body composition. Research on athletes and people trying to preserve muscle while losing fat consistently lands in the 1.6-2.2 g/kg range (roughly 0.7-1.0 g per pound). This calculator adjusts your target based on how active you are and what you're trying to achieve.
How This Calculator Works
This tool sets your daily protein in grams using the standard grams-per-kilogram-of-bodyweight approach that sports-nutrition research relies on. It converts your weight to kilograms, then multiplies it by a coefficient chosen from your activity level and goal. Each combination gives three figures — a minimum to cover basic needs, a recommended target for your goal, and an optimal upper figure for maximizing muscle retention or growth. The coefficients climb as activity and muscle-building intent rise, from around 0.8 g/kg for general health up to roughly 2.6 g/kg at the optimal end for hard-training individuals.
A Worked Example
Take someone who weighs 170 pounds, trains moderately (3–5 days a week) and wants to build muscle. First convert: 170 lb × 0.4536 = 77 kg. For that goal and activity the calculator uses 1.6, 2.0 and 2.4 g/kg. Minimum: 77 × 1.6 = 123 g. Recommended: 77 × 2.0 = 154 g. Optimal: 77 × 2.4 = 185 g. In food terms, the 154 g recommended target is about five chicken breasts, or roughly 26 eggs, or six scoops of whey — which is exactly why most people spread protein across several meals rather than chasing it all at dinner.
What Affects Your Result
- Bodyweight: Targets scale directly with weight, since the formula is grams per kilogram.
- Activity level: More training breaks down more muscle protein, raising your daily requirement.
- Goal: Building muscle or dieting to lose fat both push protein higher than a general-health baseline, to build or to protect lean mass.
- Lean body mass: Protein needs really track muscle mass, so very lean or very heavy individuals may sit at the edges of the estimate.
- Age: Older adults need more protein per kilogram to fight age-related muscle loss and overcome anabolic resistance.
- Calorie deficit: The leaner you get and the steeper your deficit, the more protein helps preserve hard-won muscle.
Frequently Asked Questions
How much protein do I need per day?
The RDA of 0.8 grams per kilogram of bodyweight prevents deficiency but is not optimal for body composition. Research on active people and those preserving muscle while dieting supports roughly 1.6 to 2.2 grams per kilogram, or about 0.7 to 1.0 grams per pound. This calculator places you within that evidence-based range based on your activity level and goal.
Can you eat too much protein?
For healthy people, intakes well above the RDA are considered safe and excess protein is not stored as toxic. Very high intakes simply get used for energy or converted and excreted. The main practical limits are appetite, cost and crowding out other foods. People with existing kidney disease should speak to a doctor before raising intake substantially.
Does it matter when I eat my protein?
Total daily protein matters far more than timing, but spreading it across three or four meals of roughly 0.4 grams per kilogram each appears to maximize muscle protein synthesis better than loading it all into one meal. A protein source within a few hours of training is a reasonable habit, though the daily total is the priority.
Do I need protein powder to hit my target?
No. Whole foods like chicken, eggs, dairy, fish, lean meat, beans and lentils can easily cover most targets. Protein powder is just a convenient, affordable way to close a gap when whole-food protein is hard to fit in — useful, but never required if you can reach your number through meals.
These protein targets are general estimates for healthy adults, not medical advice. If you have kidney disease or another condition affecting protein metabolism, talk to your doctor before increasing intake, and treat the numbers as a flexible guide rather than a strict rule.