About Protein Calculator
Calculate evidence-based daily dietary protein requirements tailored to body mass and athletic discipline: Sedentary RDA (0.8 g/kg), Endurance (1.2 – 1.4 g/kg), Active Fitness (1.4 – 1.6 g/kg), Hypertrophy (1.6 – 2.2 g/kg), and Cutting (2.0 – 2.4 g/kg).
Key Capabilities & Features
- Five evidence-based athletic tiers based on sports nutrition consensus (ISSN, ACSM, WHO)
- Recommended daily grams and target range bounds (min/max)
- Prescription rate analysis in grams per kilogram (g/kg) and grams per pound (g/lb)
- Per-meal distribution recommendations (~4 daily feedings) to optimize muscle protein synthesis (MPS)
How to Use Protein Calculator
Enter Body Weight
Input your weight in kilograms or pounds.
Select Athletic Goal
Choose between Sedentary, Endurance, Maintenance, Hypertrophy, or Cutting.
Review Daily Protein Target
Inspect recommended daily grams and optimal per-meal protein distribution.
Privacy & In-Browser Execution Guarantee
100% client-side calculation. Your data never leaves your browser.
Frequently Asked Questions
Why does protein requirement increase during a cut?
During a calorie deficit, the body risks oxidizing amino acids from muscle tissue for energy. Higher protein intake (2.0 - 2.4 g/kg) spares muscle mass and sustains nitrogen balance.
What is the leucine threshold for muscle protein synthesis?
Consuming approximately 25 to 40 grams of high-quality protein per meal supplies the ~2.5 - 3.0 grams of leucine necessary to trigger the mTOR pathway for muscle protein synthesis.