Protein Intake Calculator

Protein is the most important macronutrient for anyone who lifts weights. It provides the amino acids your body needs to repair and build muscle tissue after training. Getting enough protein is non-negotiable for making progress, but how much is enough depends on your goals, training experience, and current body composition phase.

Evidence-Based Protein Recommendations

Research consistently shows that 1.6 to 2.2 grams of protein per kilogram of body weight per day is the optimal range for muscle growth. During a caloric deficit (cutting), protein needs increase to 2.0 to 2.4 g/kg to help preserve lean mass. For maintenance phases, 1.4 to 1.8 g/kg is generally sufficient. Going above 2.4 g/kg shows diminishing returns in most studies.

Protein Timing and Distribution

Spreading your protein across 3 to 5 meals throughout the day maximizes muscle protein synthesis. Each meal should contain at least 20 to 40 grams of protein to trigger a meaningful anabolic response. The post-workout window matters, but less than previously thought. As long as you eat a protein-rich meal within a few hours of training, you are covered.

Best Protein Sources for Lifters

Prioritize complete protein sources that contain all essential amino acids. Lean meats, poultry, fish, eggs, and dairy are top choices. Plant-based lifters can combine legumes, tofu, tempeh, and grains to get a complete amino acid profile. Whey protein supplements are convenient for hitting daily targets but should not replace whole food sources entirely.