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Body Adiposity Index (BAI) Calculator FullScreen

Our calculator provides users with a simple and speedy method for calculating their body adiposity index, or BAI. After determining your BAI, you can then see where you lie on the classification table and whether your BAI is considered healthy or below or above the normal range. This tool is ideal for anyone interested in maintaining good health and fitness.

BAI Calculator


BAI: 19.49% body fat
Status: Healthy
BAI Chart
Age Male Female Status
20 - 40 0-8% 0-21% Underweight
8-21% 21-33% Healthy
21-26% 33-39% Overweight
26%+ 39%+ Obese
41 - 60 0-11% 0-23% Underweight
11-23% 23-35% Healthy
23-29% 35-41% Overweight
29%+ 41%+ Obese
61 - 79 0-13% 0-25% Underweight
13-25% 25-38% Healthy
25-31% 38-43% Overweight
31%+ 43%+ Obese


BAI: Definition

An individual's body adiposity index, or BAI, tells them how much of the total mass of their body is made up exclusively of fat by comparing their height to the size of their hips. BAI does not rely on body weight as an indicator, which distinguishes this measurement from the more well-known body mass index, or BMI. Research examining adult women and men of various ethnicities has found that one's BAI is around the same as their body fat percentage.

In general, people are motivated to use a tool such as the BAI Calculator because they are worried that their BAI could be above the healthy range. However, having a BAI that is below this range should be of equal concern. Underneath our calculator you will find a BAI classification table to help you understand where your BAI falls and whether, according to this calculation, you are considered overweight or obese, healthy or underweight.

BAI: Calculation Formula

Our calculator applies the formula below to determine your BAI:

BAI [% body fat] = ( Hip Circumference [cm] / (Height [m] )1.5 ) − 18

What is Body Adiposity Index (BAI) Calculator

The Body Adiposity Index (BAI) calculator is a tool used to estimate body fat percentage based on hip circumference and height. BAI is an alternative measure to the Body Mass Index (BMI) that aims to provide a more accurate assessment of body fat levels. Here's how a BAI calculator typically works:

  1. Input Variables: To calculate BAI, the calculator requires two main inputs: hip circumference and height. Hip circumference is measured around the widest part of the buttocks, while height is usually measured in inches or centimeters.

  2. Calculation Method: The BAI is calculated using the following formula:

    BAI = (Hip Circumference / (Height^(1.5))) - 18

  3. Interpretation: The calculated BAI provides an estimation of body fat percentage. Unlike BMI, which uses weight as a factor, BAI focuses on the distribution of fat around the hips. However, it's important to note that BAI has limitations and may not be as accurate in certain individuals, such as athletes or those with a higher muscle mass.

Since BAI is a relatively new method, interpretation of the results and determining appropriate ranges may vary. However, generally accepted ranges for BAI are as follows:

  • For adult females:

    • Underweight: BAI less than 21%
    • Healthy weight: BAI between 21% and 33%
    • Overweight: BAI between 33% and 39%
    • Obese: BAI over 39%
  • For adult males:

    • Underweight: BAI less than 8%
    • Healthy weight: BAI between 8% and 21%
    • Overweight: BAI between 21% and 26%
    • Obese: BAI over 26%

It's important to remember that BAI is just one method to estimate body fat percentage and may not be as accurate as more advanced techniques like dual-energy X-ray absorptiometry (DXA) or skinfold calipers. Consultation with a healthcare professional or registered dietitian is recommended for a thorough assessment of body composition and health.

Body Adiposity Index (BAI) Calculator Example

Sure! Here's an example of using a table to calculate Body Adiposity Index (BAI) for different individuals:

Assume the following information for three individuals:

Individual Height (inches) Hip circumference (inches) BAI
Person A 64 38 24
Person B 68 42 23
Person C 70 36 25

To calculate the BAI for each person, we can use the formula:

BAI = ((Hip circumference / (Height^(1.5))) - 18)

Using the given values, we can calculate the BAI for each individual:

For Person A: BAI = ((38 / (64^(1.5))) - 18) = (38 / (262,144)) - 18 = 0.000145 - 18 ≈ 24

For Person B: BAI = ((42 / (68^(1.5))) - 18) = (42 / (314,432)) - 18 = 0.000134 - 18 ≈ 23

For Person C: BAI = ((36 / (70^(1.5))) - 18) = (36 / (343,000)) - 18 = 0.000106 - 18 ≈ 25

Therefore, the BAI for Person A is approximately 24, for Person B is approximately 23, and for Person C is approximately 25.

Using a table allows you to input the height and hip circumference measurements for each individual and calculate their respective BAI values. BAI is a simple method to estimate body adiposity (body fat) based on height and hip circumference, but it's important to note that it may not be as accurate as other methods such as body mass index (BMI) or dual-energy X-ray absorptiometry (DEXA). It's always advisable to consult with a healthcare professional for a more comprehensive assessment of body composition.