How to Calculate BMI Index

Written by suzanna hulmes
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How to Calculate BMI Index
Slim people have a lower BMI than people who are overweight. (slim girl in big size jeans image by Anatoly Tiplyashin from Fotolia.com)

Body mass index, or BMI, is sometimes used by doctors to determine if an individual has a healthy percentage of body fat. The calculation and classifications are the same for men and women. A BMI of between 19 and 22 is considered healthy, whereas a BMI of between 25 and 29.9 is considered overweight. A BMI of 30 or over generally means that the person is obese and has a significantly higher risk of developing health problems. Despite this, calculating BMI is not always efficient as it does not take muscle mass into consideration.

Skill level:
Moderately Easy

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Things you need

  • Weighing scale
  • Tape measure

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Instructions

  1. 1

    Weight yourself to get an accurate measurement. Record this number.

  2. 2

    Measure your height in inches. Ask another person to measure you while you stand straight to achieve an accurate measurement. Multiply this number by itself to calculate the height squared. Record this number.

  3. 3

    Divide the number of pounds by the height squared and multiply the answer by 703 to calculate the body mass index.

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