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BMI, calorie, body fat, BMR, pregnancy, heart rate, water intake, and more — all free tools to help you monitor and improve your health.
Calculate your Body Mass Index
Calculate your daily calorie needs
Calculate your body fat percentage
Calculate your Basal Metabolic Rate
Calculate ideal body weight based on height and age
Calculate running pace and speed
Calculate pregnancy due dates and milestones
Calculate conception dates and fertile windows
Calculate your pregnancy due date
Discover your body type and personalized fitness strategies
Calculate your muscle mass and body composition accurately
Calculate your daily calorie needs and energy expenditure
Calculate your personalized heart rate zones for optimal training
Calculate your daily water intake requirements
Calculate BMI Prime for body mass assessment
Calculate body surface area for medical dosing
Calculate blood alcohol content levels
Calculate healthy weight range for your height
Calculate height projections and conversions
Calculate daily protein requirements
Calculate optimal sleep duration and patterns
Calculate weight loss goals and timelines
Calculate wind chill temperature effects
Calculate ovulation dates and fertility window
Calculate love compatibility and relationship scores
Our Health & Fitness calculators help you track important health metrics including Body Mass Index (BMI), daily calorie needs, body fat percentage, Basal Metabolic Rate (BMR), and Total Daily Energy Expenditure (TDEE). Whether you're tracking fitness goals, planning a pregnancy, or monitoring heart rate zones, our free tools provide accurate results instantly.
Use the BMI calculator to assess your weight category, the calorie calculator to plan daily nutrition, or the body fat calculator to understand body composition. Our pregnancy and due date calculators help expectant mothers track milestones.
All health calculators use medically recognized formulas and are validated against industry standards. However, they are for educational purposes — always consult a healthcare professional for medical advice.
Frequently asked questions about our health & fitness calculators
BMI (Body Mass Index) is calculated by dividing weight in kilograms by height in meters squared. Categories: underweight (<18.5), normal (18.5-24.9), overweight (25-29.9), obese (>=30).
Our calorie calculators use the Mifflin-St Jeor equation, considered the most accurate formula for estimating daily calorie needs. Results are estimates for nutrition planning.
BMI for children uses age- and sex-specific percentile charts. Our standard BMI calculator is for adults (18+). For children, consult a pediatrician.
No, all health calculators are completely free and require no registration. Enter your data and get instant results.