Body Adiposity Index

Body Adiposity Index Calculator

There are many ways of estimating the amount of fat in your body. One of these is the body adiposity index. 

What is the Body Adiposity Index (BAI)?

Unlike the body mass index and other indicators such as the fat free mass index, the BAI calculation does not use body weight to estimate body fat levels. 

Instead, the BAI compares an individual’s hip size (hip circumference) to their height. 

BAI is expressed as a percentage. 

How do you calculate Body Adiposity Index?

BAI is calculated using the following equation:

BAI = [Hip circumference / (height) ^ 1.5] – 18

Body Adiposity Index Calculator

Luckily, you can also calculate your BAI using an online body adiposity index calculator. Most are free and simple to use.

In addition to that, most BAI calculators also allow users to choose between different length units including:




Interpreting the results of the Body Adiposity Index Calculator

For women, a BAI of between:

21% and 33% is healthy for ages 20-39 years

23% and 35% is healthy for ages 40-59 years

25% to 38% is healthy for ages 60-79 years

For each age group, a BAI below the lower limit is considered an indicator of underweight while BAIs that are higher than the upper limit are considered indicators of overweight. Any BAI above 39% is an indicator of obesity especially in younger women. 

On the other hand, for men, a BAI of between:

8% and 21% is healthy for ages 20-39 years

11% and 23% is healthy for ages 40-59 years

13% to 25% is healthy for ages 60-79 years

Again, BAIs that fall below the lower limits of each age group are indications of an underweight body while those above the upper limits are indications of an overweight body. BAIs of above 26% may indicate obesity especially for younger men. 

Body Adiposity Index