September 12, 2006

How to Calculate Your Body Mass Index, BMI

Body mass index (BMI) is a calculation that evaluates the ratio of your weight to height to determine if you are at a healthy body weight.

BMI is often used to predict a person's risk of diseases associated with obesity, including diabetes, high blood pressure, heart disease and other conditions.

A BMI of 18.5 to 24.9 is considered normal, 25 to 29.9 is overweight, and 30 to 34.9 is considered obese. Any score higher than 35 is considered morbidly obese.

Here are the steps to calculate your BMI, courtesy of the Cleveland Clinic:

  • Take your weight in pounds and divide by 2.2
  • Multiply your height in inches by 2.54, then multiply that by 10,000.
  • Divide the first number by the second number to calculate your BMI.
  • Or, take your weight in kilograms and divide it by your height in meters squared.
  • Compare your score to recommendations for a healthy BMI.


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