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BMI - Body Mass Index

By Wendy Bumgardner, About.com

Updated: December 20, 2008

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

Definition: Body Mass Index (BMI) is a relationship between weight and height that is associated with body fat and health risk.

The equation is BMI = body weight in kilograms/height in meters squared.
Body Mass Index Calculator

Research has identified the health risks associated with a wide range of BMIs (both high and low values.)

A BMI of over 25 is considered overweight.

Pronunciation: bee-em-eye
Also Known As: BMI
Examples: My BMI shows that I am overweight.

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