Health Calculators
BMI, age, calorie, and ideal weight calculators.
Explore our collection of free health calculators and tools. Each calculator runs instantly in your browser, works offline, and includes detailed explanations, formulas, and examples. Choose a tool below to get started.
BMI Calculator
Calculate Body Mass Index with metric or imperial units and health categories.
Age Calculator
Calculate exact age in years, months, and days from date of birth.
Calorie Calculator
Calculate BMR and daily calorie needs based on activity level.
Ideal Weight Calculator
Estimate ideal body weight using multiple formulas.
Ovulation Calculator
Predict your fertile window, ovulation date, and next period based on your cycle length.
Due Date Calculator
Estimate your baby due date using last menstrual period, conception date, or IVF transfer date.
Sleep Calculator NEW
Find the best time to sleep or wake up based on 90-minute sleep cycles. Wake up refreshed, not groggy.
BMR Calculator NEW
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Know exactly how many calories you burn at rest.
TDEE Calculator NEW
Calculate Total Daily Energy Expenditure with activity level and goal-based calories for cutting, maintenance, or bulking.
Body Fat Calculator NEW
Estimate your body fat percentage using the US Navy method with height, neck, waist, and hip measurements.