Tuesday, October 21, 2014

BODY MASS INDEX --BMI

BMI = 22.96 kg/m2   (Normal)
  • Normal BMI range: 18.5kg/m2 - 25 kg/m2
  • Normal BMI weight range for the height: 128.9lbs - 174.2 lbs
  • Ponderal Index: 12.91 kg/m3

The Body Mass Index (BMI) Calculator takes age into consideration when calculating the BMI value and weight status of that individual. Below is a referenced weight range and calculation formula.

Reference

It should be noted that BMI measures your body weight based on your height and weight. Your BMI does not actually "measure" your percentage of body fat, but it helps to estimate a healthy body weight based on a person’s height. A person’s BMI "number" can serve as an indicator that a person is underweight, normal weight, overweight, or obese. Note that body types, the distribution of muscle and bone mass varies among individuals. Therefore BMI should not be the only or final indicatior for diagnosing the weight stsatus of an individual.


Body Mass Index Formula

The formulas to calculate BMI based on two of the most commonly used unit systems:

    BMI = weight(kg)/height2(m2)         (Metric Units)
    BMI = 703·weight(lb)/height2(in2)         (U.S. Units)

BMI Table for Adults

This is the World Health Organization's (WHO) recommended body weight based on BMI values for adults. It is used for both men and women, age 18 or older.

CategoryBMI range - kg/m2
Severe Thinness< 16
Moderate Thinness16 - 17
Mild Thinness17 - 18.5
Normal18.5 - 25
Overweight25 - 30
Obese Class I30 - 35
Obese Class II35 - 40
Obese Class III> 40

BMI Table for Children and Teens, Age 2-20

The Centers for Disease Control and Prevention (CDC) recommends BMI categorization for children and teens between age 2 and 20.

CategoryPercentile Range
Underweight<5%
Healthy weight5% - 85%
At risk of overweight85% - 95%
Overweight>95%

CDC GROWTH CHARTS

The Centers for Disease Control and Prevention (CDC) Age percentiles growth charts.

CDC CHARTS

Ponderal Index

Similar to BMI, the Ponderal Index (PI) is a measure of leanness of a person. It was also called Rohrer's index. Comparatively, the Ponderal Index is more even for different stature. Therefore, it was commonly used in pediatrics.

    PI = weight(kg)/height3(m3)         (Metric Units)

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