Health & Fitness Calculators

Science-based tools to help you understand your body and reach your fitness goals.

BMI Calculator

Calculate your Body Mass Index and understand what your BMI means for your health.

Find your Total Daily Energy Expenditure to plan your diet for weight loss, maintenance, or muscle gain.

Calculate your daily calorie needs based on age, sex, height, weight, activity level, and fitness goals.

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

Find your ideal body weight using four proven medical formulas. Compare results by height and frame size.

Calculate your estimated due date, current pregnancy week, trimester, and key milestone dates.