It is not accurate in some cases. Much of the time and often when it really counts the bmi measurement may actually overestimate or.

Analyzing Your Body Composition
Is bmi a valid measurement of body fat. Even then the tools may not be highly accurate. The most common screening tool is the body mass index bmi. Essentially bmi is a simple mathematical formula based on height and weight that is used to measure fatness. You should be aware of your bmi because of the health risks of being overweight that. Many studies report obesity rates as a function of body fat percentage bf which is more accurate but requires special tools to assess. Instead we should look at body fat percentage and body fat.
Body mass index bmi is a measure of body fat based on height and weight that applies to adult men and women. Bmi is not the only measurement of obesity although it is the most commonly used. As most of us fitness focused folks have likely heard bmi is far from a perfect measurement. The bmi is a number calculated from a persons weight and height. Bmi does not tell us how much muscle someone has or where their body fat is distributed such as the arms and legs vs. Bmi indicates ones weight when taking into consideration.
Its easy to figure and non invasive though so it is useful as one of several screening tools to determine the appropriateness of a persons weight. Bmi body mass index which is based on the height and weight of a person is an inaccurate measure of body fat content and does not take into account muscle mass bone density overall body. Calculate body mass index bmi of 2435. Bmi has its limitations because it doesnt directly measure your fat so its not the most reliable or valid way of determining body fat levels. Bmi is widely used as a marker of health but it turns out that its not all that accurate especially for people of color. The benefits of maintaining a healthy weight go far beyond improved energy and smaller clothing.
In most people bmi relates with body fat.