Why does the Body Mass Index say im underweight even though my body fat percentage is healthy?

Body mass index (BMI) and body fat percentage are two different measures of body composition. BMI is a measure of weight relative to height, while body fat percentage is a measure of the amount of fat in the body.

A healthy BMI for adults is typically considered to be between 18.5 and 24.9. BMI is calculated by dividing your weight in kilograms by the square of your height in meters. A BMI below 18.5 is considered underweight, and a BMI above 24.9 is considered overweight.

Body fat percentage is measured using a variety of methods, including skinfold measurements, bioelectrical impedance, and underwater weighing. A healthy body fat percentage for men is typically considered to be between 10% and 15%, and a healthy body fat percentage for women is typically considered to be between 15% and 25%.

BMI is a relatively easy and inexpensive measure of body composition, but it is not always accurate. For example, people who are very muscular may have a high BMI, but they may not be overweight or obese. Similarly, people who are very thin may have a low BMI, but they may not be underweight.

Body fat percentage is a more accurate measure of body composition than BMI, but it is also more difficult and expensive to measure. If you are not sure whether you are at a healthy weight, talk to your doctor.

It is important to note that BMI and body fat percentage are only two factors that should be considered when assessing overall health. Other factors, such as diet, exercise, and family history, also play an important role.