The BAI calculator allows you to calculate the fat percentage in your body. It is a new alternative to Body Mass Index (BMI) calculation.
To calculate your Body Adiposity Index, enter your height, hip circumference, age and gender in the BAI calculator. The BAI calculator then calculates how high your body fat percentage is.
Formula of Body Adiposity Index (BAI)
| Age (years) | Underweight | Healthy | Overweight | Obese |
|---|---|---|---|---|
| 20 – 39 | Less than 8% | 8% to 21% | 21% to 26% | Greater than 26% |
| 40 – 59 | Less than 11% | 11% to 23% | 23% to 29% | Greater than 29% |
| 60 – 79 | Less than 13% | 13% to 25% | 25% to 31% | Greater than 31% |
| Age (years) | Underweight | Healthy | Overweight | Obese |
|---|---|---|---|---|
| 20 – 39 | Less than21% | 21% to 33% | 33% to 39% | Greater than 39% |
| 40 – 59 | Less than 23% | 23% to 35% | 35% to 41% | Greater than 41% |
| 60 – 79 | Less than 25% | 25% to 38% | 38% to 43% | Greater than 43% |
To estimate the body fat percentage (KFA) of a person, there are various calculation tools. Widely used is the calculation with the help of a method developed by the US Navy (to the KFA calculator according to US Navy method). Here, neck circumference, waist circumference and hip circumference are used for the calculation.
The Body Adiposity Index (BAI) does not take your weight into account when assessing your physique, but instead puts your hip circumference in relation to your age, height and gender. This is to estimate the body fat content.
As an alternative to the Body Mass Index (BMI), American researchers have developed another formula: the Body Adiposity Index (BAI). The idea behind it is to design a calculation that uses only your height and hip circumference as parameters.
Probably the most important advantage of the BAI over the BMI is that you don't have to provide a weight, which makes it possible to determine a measurement even in situations or places where a bathroom scale is not available.
Another advantage of the Body Adiposity Index is that it approximates body fat percentage, whereas the widely used BMI is of limited accuracy and gives different values for men and women with similar body fat percentage.
Limitations of the BAI
In 2012, a more detailed study on the Body Adiposity Index concluded that estimates of body fat percentage based on BAI do not provide a more accurate indication of overweight than those based on BMI, waist-to-hip ratio (WHR), or waist-to-height ratio (WHtR).
Obesity indices that include waist circumference (e.g., the WHtR recommended by Fettrechner.de) are more appropriate than BAI and BMI in assessing health risks.