What is the formula for calculating body mass index and ideal body weight?

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# What is the formula for calculating body mass index and ideal body weight?

1 doctor weighed in

Dr. Barry Handler

Surgery - Plastics

## In brief: BMI

The body mass index is equal to the person's weight divided by the square of their height.

Ideal body weight will vary with age, sex, muscle/fat ratio, height and bone density. Bmi is only a rough guide of a person's ideal body weight which is usually a range and not an absolute number. Generally a bmi less than 18 is underweight, 18-25 is ideal, 25-30 is overweight and over 30 is obese.

## In brief: BMI

The body mass index is equal to the person's weight divided by the square of their height.

Ideal body weight will vary with age, sex, muscle/fat ratio, height and bone density. Bmi is only a rough guide of a person's ideal body weight which is usually a range and not an absolute number. Generally a bmi less than 18 is underweight, 18-25 is ideal, 25-30 is overweight and over 30 is obese.

Dr. Barry Handler

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