What is BMI?

How do you know you are obese? Body Mass Index (BMI) is the recommended practical approach to assess an individual's body fat. It provides a more accurate measure of total body fat compared with body weight. BMI is a measure of weight in relation to height:

BMI Calculator
BMI:



Definition:
Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to both adult men and women.

Formula:
  • Metric:
    Weight (kg) / [Height (m)]2
  • English:
    ( Weight (lb) / [Height (in)]2 ) x 703

According to the Panel on Energy, Obesity, and Body Weight Standards published by American Journal of Clinical Nutrition, your category is:

  • Normal BMI 18.5 to 24.9
  • Overweight 25 to 29.9
  • Obesity 30 to 39.9
  • Extreme Obesity Greater than 40

*Download PDF of BMI Chart