Health Metrics Calculator

I'll create a comprehensive health metrics calculator for you! The application will feature a responsive interface with tabbed sections for BMI (with WHO classifications), body fat percentage using Navy and Jackson-Pollock methods, ideal weight calculations across four medical formulas, and calorie needs using all three standard BMR equations. I'll implement localStorage for profile management, Chart.js for trend visualization, and jsPDF for report generation with both metric/imperial unit support throughout.

I can help you build this health calculator, though I should note that any health metrics tool should include clear disclaimers that it's for informational purposes only and not medical advice. The implementation would include validated calculation algorithms based on established medical formulas, a progressive form interface with input validation, and local storage for tracking trends. I'd recommend adding accessibility features like ARIA labels and keyboard navigation, plus prominent disclaimers about consulting healthcare professionals for personalized medical guidance.

I'll develop a health metrics calculator implementing the specified medical formulas. The BMI calculator will use the standard weight(kg)/height(m)² formula with WHO classification ranges (underweight <18.5, normal 18.5-24.9, overweight 25-29.9, obese ≥30). For BMR, I'll implement Harris-Benedict (revised 1984 equations), Mifflin-St Jeor (1990), and Katch-McArdle formulas, with TDEE multipliers from 1.2 (sedentary) to 1.9 (very active) based on published activity factors. The interface will use HTML5 form validation and localStorage API for data persistence.