Health & Fitness

Health calculators — BMI, calorie, body fat, ideal weight, and more.

Calculate your Body Mass Index (BMI) instantly. Supports imperial and metric units. Free, private, no sign-up.

Calculate your daily calorie needs (TDEE) based on age, gender, weight, height, and activity level.

Calculate your estimated due date based on your last menstrual period. See current week and trimester.

Calculate your daily macronutrient needs. Get protein, carb, and fat targets for any diet type.

Estimate your body fat percentage using the US Navy method. See fat mass, lean mass, and fitness category.

Find your ideal weight range using multiple scientific formulas. Robinson, Miller, Devine, and Hamwi methods.

Calculate your heart rate training zones using the Karvonen method. Optimize your cardio workouts.

Calculate how much water you should drink daily based on your weight and activity level.

Calculate optimal bedtimes or wake times based on 90-minute sleep cycles. Wake up refreshed.

Estimate your blood alcohol content (BAC) based on drinks, weight, and time. For educational purposes only.