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Nutrition & DietACSM / ISSN Clinical Guidelines

Protein Calculator

Determines optimal daily protein targets in grams based on body weight, training intensity, and health goals according to sports science standards.

Nutrition & Diet

Protein Calculator

Find the optimal daily protein intake for muscle building, fat loss, or health maintenance.

Weight20 – 350 kg
kg
Recommended Protein TargetACSM / ISSN
143 g/dayRange: 120 – 165 g (572 kcal)
Sedentary / Baseline RDA60 – 60 g/day
Active Maintenance90 – 105 g/day
Endurance Athlete105 – 128 g/day
Muscle Growth / Hypertrophy120 – 165 g/day
Fat Loss & Muscle Retention135 – 180 g/day

Evidence-based estimations. Consult a physician for personalized guidance.

Clinical Formula & Calculation Standard

Official clinical definitions and validated mathematical models

Evidence-Based Daily Protein Intake (ISSN / ACSM)

Baseline RDA: 0.8 g/kg body weight | Active / Resistance: 1.6 – 2.4 g/kg body weight

Estimates required protein consumption to prevent nitrogen deficiency and support muscle protein synthesis.

Clinical Protein Ingestion Recommendations

Population GroupDaily Grams / kgNotes & Scientific Rationale
Sedentary Adults (RDA)0.8 g / kgMinimum to avoid negative nitrogen balance in healthy adults
Active Maintenance1.2 – 1.4 g / kgSupports cellular turnover in moderate recreation
Endurance Athletes1.4 – 1.7 g / kgCompensates for amino acid oxidation during distance training
Resistance Training (Hypertrophy)1.6 – 2.2 g / kgMaximizes muscle protein synthesis and lean mass gain
Hypocaloric Fat Loss (Cutting)1.8 – 2.4 g / kgHigh satiety, preserves lean mass in an energy deficit

Clinical Insights & Practical Usage

  • Distributing protein across 3–4 meals containing 0.4 g/kg per meal optimizes 24-hour muscle protein synthesis.

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