Body mass index (BMI)- the number tells us if we are overweight, obese or underweight. BMI is calculated from the person’s body weight and height. BMI does not tell the exact quantity of fat in the body but it's an overall estimation through which people can understand whether his/ her body fat is high, low or normal. BMI is the parameter which we use to assess the overall risk of developing heart disease when patients are overweight or obese.
BMI is the most widely accepted method to know if the individual is having the normal or desirable weight as it is inexpensive, convenient and is calculated on the basis of height and weight of the individual.
BMI is calculated based on the following formula
BMI = Weight in (KG) / Height2 (meters)
BMI = Weight (lbs) * 700 / height (inches)
The following are the BMI ranges which tells us if some body is under weight, normal or over weight.
BMI Weight Status
Below 18.5 Underweight
18.5 – 24.9 Normal
25.0 – 29.9 Overweight
30.0 and Above Obese
We can not completely depend on the Body mass index to find out the body fat. BMI depends on the sex, age and race of the person.
For the same BMI number women might have higher body fat then men
For the same BMI number older people might have higher body fat then younger people.
Athletes might have high body mass index due to muscles rather than fat in the body.
The following are the health risk factors if BMI is 30.0 and above