Track Body Composition with Precision
Professional body fat analysis and patient tracking for fitness coaches, nutritionists, and healthcare providers. Get accurate results using proven scientific formulas.
Everything You Need for Body Composition Analysis
Professional-grade tools designed for accuracy, efficiency, and comprehensive patient management.
Multiple Formulas
Choose from Durnin/Womersley, Jackson/Pollock, Siri, Brozek, and Behnke formulas for accurate body composition analysis.
Patient Tracking
Monitor patient progress over time with detailed charts and historical data. Keep all measurements organized in one place.
Ranges Table
Compare results against standardized ranges by age and gender. Easily identify where patients fall in the spectrum.
Intuitive Interface
Fast and easy-to-use calculator with real-time results. Designed for professionals who need quick, accurate measurements.
Scientific Formulas at Your Fingertips
Access multiple validated body composition formulas including Durnin/Womersley for body density and Behnke, Siri, and Brozek for body fat percentage calculations. Each formula is optimized for different populations and measurement protocols.
- Multiple validated calculation methods
- Detailed formula descriptions and use cases
- Easy formula selection and switching
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Track Patient Progress Over Time
Monitor your patients' body composition changes with detailed charts and historical data. Visualize trends, identify patterns, and make data-driven recommendations for better outcomes.
- Interactive charts with multiple data points
- Historical measurement tracking
- Patient profile management
Compare Against Standardized Ranges
Access comprehensive reference tables showing body fat percentage ranges by age and gender. Quickly identify where your patients fall in categories from essential to obesity, with color-coded visual indicators.
- Age and gender-specific ranges
- Color-coded categories for quick assessment
- Evidence-based reference standards
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Trusted by Health Professionals
See what fitness coaches, nutritionists, and healthcare providers are saying about Plixi - Fat Calculator.
It's extremely rare to find a free app that doesn't ask for any personal information, no create an account and no bombardment of annoying ads just for a simple calculation. It's a very minimalistic app but it speaks volume. Worth the download.
CeontreS
Excellent calculator with all options available. Love that you can save clients results! Recommended.
Alexandros Charalambous
The app is simple and has a good selection of measurement methods. Had the ability to save data for multiple users.
Graeme Humphrey
Frequently Asked Questions
Everything you need to know about Plixi - Fat Calculator and body composition analysis.
Ready to Transform Your Practice?
Join thousands of health professionals using Plixi - Fat Calculator to deliver accurate body composition analysis and track patient progress.
Free to download • Available on iOS and Android