Health & Fitness Tools

Comprehensive health and fitness calculation tools for wellness tracking and athletic performance. Calculate BMI with health classification and visual chart, determine daily calorie needs with TDEE and BMR formulas, estimate body fat percentage using Navy, skinfold and other methods, find ideal weight by Devine, Robinson, Miller and Hamwi formulas, calculate daily protein, carb and fat macros based on goals, determine daily water intake from weight and activity level, find optimal sleep and wake times based on 90-minute cycles, check blood type compatibility for donation, transfusion and pregnancy, estimate blood alcohol concentration from drinks, weight and time, predict ovulation and fertile window from menstrual cycle, calculate target heart rate zones for fat burning, cardio and high intensity, compute waist-to-hip ratio for health risk assessment, estimate one-rep max from weight and reps, calculate running pace, distance or finish time, estimate calories burned for 100+ exercises, time HIIT, Tabata, EMOM and custom workouts, plan even or negative running splits, calculate Wilks and DOTS scores for powerlifting comparison, and estimate VO2 max from Cooper, beep test or race performance.