Protein Intake Calculator

The Recommended Dietary Allowance (RDA) of 0.8 g/kg represents the minimum threshold required to prevent nutritional deficiency in sedentary individuals. The International Society of Sports Nutrition recommends 1.4 to 2.0+ g/kg to optimize recovery, muscular adaptation, and athletic performance.

Multiple randomized controlled trials spanning over two decades show that protein intakes up to 2.8 to 3.3 g/kg do not impair glomerular filtration rate or renal biomarkers in individuals with healthy kidneys. Individuals with pre-existing renal disease, however, require medical protein restriction.

Leucine is an essential branched-chain amino acid that acts as a primary molecular trigger for the mTOR pathway, initiating muscle protein synthesis. Consuming approximately 2.5 to 3.0 grams of leucine (roughly 25–35 grams of complete animal or fortified plant protein) per meal optimizes this response.

Some plant protein sources possess lower concentrations of essential amino acids (notably leucine and methionine) and lower ileal digestibility. Plant-based athletes often benefit from targeting the higher end of the recommended intake range (1.8–2.2 g/kg) and combining varied sources.

In individuals with high adiposity (BMI > 30), calculating protein based on total body weight can overestimate protein requirements. In such cases, basing calculations on goal weight or estimated lean body mass provides a more appropriate nutritional prescription.