Body mass index (BMI) caculator

The Body Mass Index (BMI) was invented in the 19. century by Adolphe Quetelet to evaluate the body mass.
For American system, (feet, inch, pund)





 

This is the official classification of the Body Mass Index from the WHO.

Meaning	BMI
Normal weight	19–24,9
Over weight	25–29,9
Obesity I	30–34,9
Obesity II	35–39,9
Obesity III	≥ 40

This stric classification is good for science. To real classification of one single person it isn't perfect. For example, there is no matter of sex or age. But there are classification, which take care of this. Here is the table of National Research Council (NRC) from 1989:

Age	BMI
19–24	19–24
25–34	20–25
35–44	21–26
45–54	22–27
55–64	23–28
Ab 65	24–29

 

[caption id="attachment_286" align="aligncenter" width="300"] body mass index[/caption]

BMI Formula

The Body Mass Index is calculated by the following formula:

body weight in Kilogramm divided by body height in Meter to the second
or
BMI = x KG / (y M * y M)

x=body weight in KG
y=body height in M

Example for 175 cm size and 70 kg weight:
BMI = 70 / (1,75 * 1,75) = 22,86

The resulting value is Kilogramm per Meter by the second or short KG/M². In most cases this can be left. There is no really sense in this, because humans are no mathematical square.

 

[caption id="attachment_287" align="aligncenter" width="277"] ideal-bmi[/caption]

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