Free online fitness tools to scientifically evaluate your training results
FFMI Calculator ยท Body Fat Analysis ยท Bodybuilding Pose Scoring ยท Muscle Mass Assessment
Calculate your Fat-Free Mass Index to evaluate muscle development
Measure body fat using skinfold thickness method, supports 3-point and 7-point modes
Calculate daily Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE)
Calculate aerobic heart rate training zones for scientific exercise intensity guidance
AI-powered bodybuilding pose analysis to evaluate your pose score
Evaluate body proportions based on golden ratio, identify weak points
Plan carb cycling diet based on Katch-McArdle formula
Carb tapering strategy for sustainable fat loss
High carb low fat strategy for high-volume trainers
Assess metabolic adaptation level and get reverse dieting recovery plan
Professional, free, and secure fitness data analysis platform
Forever free, no registration required
Advanced AI technology for precise analysis
Based on sports science research
Data processed locally, never uploaded
Whether you are a fitness beginner or a professional athlete, our tools can help you better understand your body
Understand your body data and create a scientific starter plan
Track muscle mass changes and evaluate muscle gain progress
Monitor body fat changes for sustainable fat loss
AI scoring system helps optimize competition poses
Muscle Tool is a free online fitness calculator platform, providing professional body composition analysis and training evaluation tools for fitness enthusiasts, bodybuilders, and personal trainers. No app download required, just open the webpage to use.
To provide every fitness enthusiast with professional-grade data analysis tools, using scientific methods to evaluate training results and develop reasonable fitness plans.
Data-driven fitness, science-guided training. Through quantitative indicators to help you understand your body condition, avoid blind training, and improve fitness efficiency.