Fitness & Health Tools

About Health & Fitness Calculators

Professional health and fitness calculator suite for individuals, personal trainers, nutritionists, and healthcare professionals seeking accurate body composition and metabolic assessments. This comprehensive toolkit includes six science-based calculators: BMI Calculator using WHO standard formula for weight classification and health risk assessment; Calorie Calculator with Mifflin-St Jeor equation for daily energy needs based on age, gender, weight, height, and activity level; BMR Calculator providing basal metabolic rate estimates using multiple validated formulas including Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle; TDEE Calculator combining BMR with activity multipliers for total daily energy expenditure essential for weight loss, maintenance, or muscle gain goals; Body Fat Calculator using U.S. Navy circumference method for body composition analysis without expensive equipment; and Ideal Weight Calculator applying Devine, Robinson, Miller, and Hamwi formulas for healthy weight range determination. Essential for fitness tracking apps integration, personal training program design, nutrition planning with MyFitnessPal and Cronometer, medical consultations, weight management clinics, and sports performance optimization. All calculations run entirely in your browser with complete privacy protection, no account required, and instant results for health-conscious individuals following ketogenic, intermittent fasting, IIFYM (If It Fits Your Macros), or traditional calorie-counting approaches.