Question

Body Mass Index (BMI)

# How do I calculate my body mass index (BMI)?

• AMarjorie Nolan Cohn, Nutrition & Dietetics, answered on behalf of Academy of Nutrition and Dietetics

BMI stands for body mass index and is a measure of height to weight. It doesn’t take into consideration age or gender. Therefore is not the most reliable measure for obesity. It is however, and good rule of thumb tool when trying to determine your health risks associated with weight.

BMI Categories:

• Underweight = <18.5
• Normal weight = 18.5–24.9
• Overweight = 25–29.9
• Obesity = BMI of 30 or greater

To calculate your BMI measure your weight in pounds and height in inches. Then multiply the answer by 703

• [Weight / (height x height)] x 703 = BMI
• ARose Reisman, Nutrition & Dietetics, answered
To find your body mass index (BMI), multiply your weight in pounds by 705, then divide the result by your height in inches, then divide again by your height. The result is your BMI. Get out your calculator.

For example, a woman weighs 150 pounds and her height is 5 feet 6 inches (66 inches):

150 lb x 705 = 105,750
105,750/66 = 1602
1602/66 = 24 BMI

Body Mass Index, or BMI, is a reliable indicator of body fatness based on your height and weight, and places you in one of three categories: normal, overweight or obese.

Free BMI App - A new smartphone app from the National Institutes of Health can let your phone tell you. To get the free app, search “My BMI Calculator” on your phone today.