Calculate your Body Mass Index (BMI) and estimate daily caloric needs based on your weight, height, age, sex and activity level. Understanding your BMI and caloric requirements can help you set realistic health and fitness goals.
BMI is a simple index of weight‑for‑height that is commonly used to classify underweight, overweight and obesity in adults. It is calculated by dividing weight in kilograms by the square of height in metres. However, BMI does not differentiate between muscle and fat mass, so athletes may have a high BMI while still having low body fat.
Daily calorie needs are based on your basal metabolic rate (BMR) and activity level. The Mifflin‑St Jeor equation is used here. Once you know your caloric target, you can distribute your intake into macronutrients (carbohydrates, proteins and fats) according to your goals.