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What is BMI?
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Published on 04/25/2007
 

Obesity is most often measured by a mathematical formula called a Body Mass Index (BMI). BMI can be determined by separating the weight in pounds by the height in inches squared and then multiplying by 705. An individual is measured underweight if their BMI is less than 18.5. A BMI of 18.5 to 24.9 is considered a standard weight.


What is BMI?

Obesity is most often measured by a mathematical formula called a Body Mass Index (BMI). BMI can be determined by separating the weight in pounds by the height in inches squared and then multiplying by 705.

What does BMI mean?

An individual is measured underweight if their BMI is less than 18.5. A BMI of 18.5 to 24.9 is considered a standard weight. A BMI of 25 to 29.9 is considering overweigh. Individuals who fall into the BMI range of 25 to 34.9 begin having several health risk concerns. Particularly those who have a waist size of more than 40 inches for men, or 35 inches for women, have a high risk for obesity-related health problems like diabetes, high blood pressure and heart disease. A BMI of 30 or more qualifies a person as obese. A BMI over 40 point out that a person is too much obese. BMI is the general acronym given to Body Mass Index.  A figure calculated from the weight and height that roughly correlates to the percentage of the total weight that comes from fat, as different to muscle, bone or organ. The upper a person's BMI, the higher the proportion of fat in their body. If the BMI is under 20, one might be underweight. Between 20 and 25, and are probably at a good healthy weight for the height. A BMI over 25 is considered overweight and over 35 is considered obese.

Measuring chart:

Charts and calculators to determine the BMI are easily found on most health and diet sites. These calculators are rough translations of true fraction and there are a number of factors that may influence whether or not the BMI is a true reflection of the total body fat. If muscle is denser than fat and takes up less space then a heavily muscled person might weigh more than a similar sized over-weight person.  Or two individuals with identical BMI might have widely different percent body fat. Calculating the percent body-fat might require more sophisticated equipment like an immersion tank. Women usually carry more subcutaneous fat than men do.  Particularly in the breast and hips and so their percent body fat might be higher without it necessarily being reflected in their BMI or having any adverse health effects.


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