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.
Find your best bedtime or wake-up time based on 90-minute sleep cycles, so you wake at the end of a cycle feeling refreshed instead of groggy.
Check blood type compatibility for donation, transfusion, and pregnancy. Instantly see if blood types match, find compatible donors, and assess Rh factor risk for expecting parents.
Calculate your Body Mass Index from weight and height. See your health category on a visual gauge, plus your healthy weight range and personalized tips.
Find how many calories to eat each day to lose, maintain, or gain weight. Get your TDEE, BMR, goal targets, and a macro breakdown from your body and activity level.
Estimate your body fat percentage using Navy, BMI-based, or RFM methods. See your health category, fat mass, lean mass, and FFMI.
Calculate your ideal body weight using four medical formulas — Devine, Robinson, Miller, and Hamwi — and see your recommended weight range instantly.
Calculate your daily protein, carbs, and fat needs from your body stats, activity level, and fitness goal. Supports Standard, High Protein, Low Carb, and Keto diet plans.