FitPortal — Science-Based Fitness Calculators, Tactical Readiness & Nutrition Engine
FitPortal is an elite, evidence-based exercise physiology and sports nutrition platform. Featuring 46+ interactive fitness calculators, clinical formula guides, and peer-reviewed athletic training frameworks.
Top Fitness Calculators & Tools
- 1RM Max Calculator: Calculate your exact one-rep maximum load using Epley and Brzycki equations. 1RM Calculator
- BMR & TDEE Calculator: Determine basal metabolic rate and daily energy expenditure using the Mifflin-St Jeor formula. BMR & TDEE Calculator
- Body Fat Calculator: Measure body fat percentage via the U.S. Navy circumference algorithm. Body Fat Calculator
- Protein Intake Calculator: Calculate optimal protein target in grams per day based on ISSN guidelines. Protein Calculator
- Running Pace Calculator: Predict 5K, 10K, Half Marathon, and Full Marathon race pace targets using Riegel equations. Running Pace Calculator
- Combat Fitness Calculator: Assess ACFT, Marine PFT, and tactical readiness score. Combat Fitness Calculator
- Wilks & DOTS Score Calculator: Calculate relative powerlifting performance coefficient. Wilks Calculator
- FFMI Calculator: Evaluate natural muscle limit and lean mass potential. FFMI Calculator
Peer-Reviewed Training & Nutrition Guides