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Understanding Body Mass Index (BMI)

Body mass index (BMI) is a way of finding a healthy weight. The higher your BMI, the greater your risk for obesity and health problems.

What BMI Means:

  • BMI below 18.5: Underweight

  • BMI 18.5 to 24.9: Healthy weight

  • BMI 25 to 29.9: Overweight

  • BMI 30 and over: Obese

Using the BMI Chart

To figure your BMI, find your height and weight (or the numbers closest to them) on the chart below. Follow each column of numbers to where your height and weight meet on the chart. That is your BMI.

Using the BMI Formula

Example

1. Multiply your weight in pounds by 703.

1. 160 pounds x 703= 112480

2. Divide the answer by your height in inches.

2. 112480 ÷ 63 inches= 1785

3. Divide this number by your height in inches again.

This is your BMI.

3. 1785 ÷ 63 inches= BMI of 28
Online Source: U.S. Bureau of Consumer Protection. The Partnership for Healthy Weight Management http://www.consumer.gov/weightloss/bmi.htm
Online Source: U.S. Bureau of Consumer Protection. The Partnership for Healthy Weight Management http://www.ific.org/publications/brochures/upload/Weight-Loss-Finding-a-Program-That-Works-for-You.pdf
Online Medical Reviewer: Happel, Cindy MEd, RD
Date Last Reviewed: 4/5/2005
Date Last Modified: 4/5/2005