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Body Mass Index (BMI) is a method of figuring out the degree of excess weight, based on weight and height. You can calculate it by dividing your weight by the square of your height.
People with BMIs between 19 and 22 live longest. Death rates are noticeably higher for people with indexes 30 and above.
To figure your BMI, enter your height and weight in the boxes below and then click on the BMI box. You can also indicate your height and weight by sliding the bars.