# What is Body Mass Index – How is BMI Calculated

The body mass index (BMI) is an objective measurement that can be used to help people effectively manage their body weight. In order to calculate your body mass index you will need to know your weight in kilograms and your height in meters. The simple mathematical calculation involves just dividing your weight by the squared measurement of your height.

 Imperial BMI Formula BMI = (Weight in Pounds / (Height in inches x Height in inches)) x 703 Metric BMI Formula BMI = (Weight in Kilograms / (Height in Meters x Height in Meters))

## What is BMI Used For

One of the primary benefits of the body mass index calculation is that it takes some of the emotional factors out of decisions and judgments about weight and the need for weight loss. Because it is a mathematical formula that takes both height and weight into consideration, it truly is an unbiased means of coming up with a quantitative indicator of the presence or absence of a weight problem.

Body mass index is used to indicate whether or not a person falls in a range of being underweight, normal weight, overweight, or obese.

• In an adult, a body mass index of 18.5 or lower is considered underweight.
• The normal range for body mass index is between 18.5 to just under 25.
• A BMI of 25 to just under 30 is considered overweight.
• Those with a BMI of 30 or higher are classified as obese, with 40 being the indicator of the presence of extreme obesity.

Those whose body mass index falls in or near the range of obesity need to be aware of the health risks associated with having a high body mass index, so they can take necessary steps to reduce their risk factors. Some of the numerous diseases and conditions that are associated with a high body mass index include the following: increased chances for developing heart disease, increased risk of developing diabetes, and an increased occurrence of high blood pressure.