Body Adiposity Index Calculator Explained

By Last updated: January 11, 2024

BAI – Body Adiposity Index Calculator

What is the body adiposity index?

The Body Adiposity Index (BAI) is a methodology for estimating an individual's body fat. Unlike the Body Mass Index (BMI), which relies on body weight, BAI calculates body fat based on the size of the hips to a person's height.[1]

BAI Classification

Please refer to the BAI classification table below to determine your current body fat classification.

For man

20-39< 8%8% - 20%21% - 25%> 26%
40-59< 11%11% - 22%23% - 28%> 29%
60-79< 13%13% - 24%25% - 30%> 31%
BAI classifications for men.

For woman

20-39< 21%21% - 32%33% - 39%> 39%
40-59< 23%23% - 34%35% - 40%> 41%
60-79< 25%25% - 37%38% - 43%> 43%
BAI classifications for women.
We strive to make our calculator apps as accurate as possible, but they cannot replace a professional doctor. Our website provides information for informational purposes, and it's not medical advice. Please consult your healthcare provider before making any decisions based on the results provided by our tool.

User Guide

This guide provides step-by-step instructions for using our calculator.

BAI – Body Adiposity Index Calculator

How do you use the body adiposity index calculator?

To calculate the body adiposity index or BAI using our calculator, use the following steps:

  1. Check your preferred unit system.
  2. Enter your height.
  3. Enter your hip circumference.

BAI Calculator - Input Form

Check the unit system and enter height and hip circumference.

When you fill in all the required information, our BAI calculator will calculate and show your body adiposity index results.

BAI Calculator - Result

With that result, you can check your health classification based on your BAI, gender, and age from the table under the calculator.

BAI Calculator - Classification

Calculation Features

Our calculator has some essential features to help you fill in your information and get the result as quickly as possible.

Type, Click, or Swipe

We developed the calculator to accept all interaction methods to speed up your information-filling process. In most input fields, you don't need to use the keyboard. You can use the mouse or finger to adjust the field value by swiping within a predefined range.

Assisted information-filling

More ways to adjust the value

Some calculators also offer a range of preset values, which you can quickly enter by clicking the associated button.

Preset Values

You can fill the field with preset values.

Metric or Imperial Unit

Each calculator has a unit switcher button right under the form. The calculator switches between the metric and imperial systems when you click or tap on it. All input values are converted to an appropriate target unit (e.g., cm to feet, in).

Health Calculator - Unit System Switcher

Convert values between metric and imperial systems.

Reload the form

Click the refresh icon or button under the form to calculate new information.

Health Calculator - Reload the form


Our calculator provides personalization features, allowing users to customize the user interface to match their preferences.

Change dark mode

By default, our calculator dark mode follows your system's preference. However, you can change it by opening the Settings menu and turning on/off the dark mode switch.

Health Calculator - Change Dark Mode

Open the Settings menu and toggle the dark mode switch.

Change theme color

Our calculator comes with several theme colors to match your preferences. You can change them by opening the Settings > Theme menu and selecting your favorite color.

Health Calculator - Change Theme Color

Open the Settings menu, open the Theme menu, and select a color.

BAI – Body Adiposity Index Calculator

BAI – Body Adiposity Index Calculator App

About this app

Our Body Adiposity Index (BAI) calculator is a simple tool that calculates your total body fat out of your total body mass using information about your height and hip circumference to get your results.

App availability

You can use the calculator for free as a PWA web app online or install it locally on any modern operating system, including Android, iOS, Windows 11/10, and macOS.

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1 Source

  1. ⬆️ Bergman, R. N., Stefanovski, D., Buchanan, T. A., Sumner, A. E., Reynolds, J. C., Sebring, N. G., Xiang, A. H., & Watanabe, R. M. (2011). A Better Index of Body Adiposity. Obesity19(5), 1083–1089.