This BAI and BMI calculator estimates both your body’s adiposity index and body mass index level and display as well the range category you belong to: underweight, healthy, overweight or obese. There is in depth information about the two formulas employed right after the tool.


Your gender:*
Your age range:*
Unit system:*
Your height:*
Your weight:*
Hip circumference:*

How does this BAI and BMI calculator work?

This health tool aims to help you discover two figures that both relate to your body status. One is the traditional BMI range and the other one is the Body Adiposity Index in such a way to let you compare the two results.

The algorithm behind this BAI and BMI calculator uses the equations explained in the next rows, while it takes account of the gender, age range, weight, height and hip circumference:

BAI formula that considers only the hip circumference and height:

Body Adiposity Index Formula

BMI formula that requires the height and weight to be given:

Body Mass Index BMI Formula

Please note that both measurement units English and Metric are supported and that apart from the two health figures, this calculator checks as well the BAI classification (which is gender and age specific) and the BMI range.

BAI classification

Female Body Adiposity Index (BAI) Classification

Age range

[BAI_minimum

BAI_maximum)

Status

20 - 39

0%

21%

Underweight

20 - 39

21%

33%

Healthy

20 - 39

33%

39%

Overweight

20 - 39

Over 39%

Obese

40 - 59

0%

23%

Underweight

40 - 59

23%

35

Healthy

40 - 59

35

41%

Overweight

40 - 59

Over 41%

Obese

60 - 79

0%

25%

Underweight

60 - 79

25%

38%

Healthy

60 - 79

38%

43%

Overweight

60 - 79

Over 43%

Obese

 

Male Body Adiposity Index (BAI) Classification

Age range

[BAI_minimum

BAI_maximum)

Status

20 - 39

0%

8%

Underweight

20 - 39

8%

21%

Healthy

20 - 39

21%

26%

Overweight

20 - 39

Over 26%

Obese

40 - 59

0%

11%

Underweight

40 - 59

11%

23

Healthy

40 - 59

23

29%

Overweight

40 - 59

Over 29%

Obese

60 - 79

0%

13%

Underweight

60 - 79

13%

25%

Healthy

60 - 79

25%

31%

Overweight

60 - 79

Over 31%

Obese

BMI ranges

BMI Ranges - no gender specific (in kg/m2)
[BMI_minimum BMI_maximum) Status
0 15 Very severely underweight
15 16 Severely underweight
16 18.5 Underweight
18.5 25 Normal (healthy weight)
25 30 Overweight
30 35 Obese Class I (Moderately obese)
35 40 Obese Class II (Severely obese)
over 40 Obese Class III (Very severely obese)

Example of a BAI & BMI calculation

Let’s figure out the two figures for a male aged between 20 - 39 years having a total weight of 270 lbs, a height of 6 feet and 4 inches and a hip circumference of 35 inches:

His Body Adiposity Index (BAI) percentage is 15.15%. Considering this BAI percentage, the gender and the age range his body is Healthy.

His Body Mass Index (BMI) is 32.87kg/m2. Based on the BMI ranges his body is considered to be Obese Class I (Moderately obese).

References

1) BMI Classification. (2006) Global Database on Body Mass Index. World Health Organization.

2) Gadzik J. (2006) How much should I weigh? -- Quetelet's equation, upper weight limits, and BMI prime. Conn Med; 70(2):81-8.

05 May, 2015 | 0 comments

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