BMI (Body Mass Index) is a measure of body fat based on height and weight. It is calculated by dividing weight in kilograms by the square of height in meters.

A healthy BMI range is 18.5 to 24.9. Below 18.5 is underweight, 25 to 29.9 is overweight, and 30 or above is obese.

BMI is a general screening tool and may not be accurate for athletes, pregnant women, or the elderly. Consult a healthcare professional for a complete health assessment.