Body Adiposity Index (BAI) Calculator

Use this calculator to determine your Body Adiposity Index (BAI), which helps you measure body fat percentage based on your height and hip circumference.

Calculate BAI

Results

Your Body Adiposity Index (BAI) is:

Source and Methodology

All calculations are based on the research by Richard N. Bergman et al., which provides a mathematical model to estimate body fat percentage using hip circumference and height. Read more about the study here.

The Formula Explained

The BAI is calculated using the following formula:

\[ \text{BAI} = \frac{\text{Hip Circumference in cm}}{\text{Height in m}^{1.5}} - 18 \]

Glossary of Terms

How It Works: A Step-by-Step Example

For example, if your hip circumference is 95 cm and your height is 1.75 m, your BAI is calculated as:

\[ \text{BAI} = \frac{95}{1.75^{1.5}} - 18 \]

This results in a BAI of approximately 24.8, indicating a healthy range.

Frequently Asked Questions (FAQ)

What is the Body Adiposity Index (BAI)?

The BAI is a method for estimating body fat percentage using hip circumference and height, without needing weight measurements.

How accurate is the BAI?

While BAI can provide a general estimation, it may not be as precise as other methods like DXA scans.

Can BAI be used for all age groups?

BAI is generally suitable for adults but may not be accurate for children or elderly individuals.

How does BAI compare to BMI?

BAI considers body fat distribution, while BMI only considers weight and height, potentially offering more insight into body composition.

Is BAI a replacement for professional medical advice?

No, BAI is a tool for personal insight and should not replace professional health evaluations.

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Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
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Formula (extracted LaTeX)
\[\text{BAI} = \frac{\text{Hip Circumference in cm}}{\text{Height in m}^{1.5}} - 18\]
\text{BAI} = \frac{\text{Hip Circumference in cm}}{\text{Height in m}^{1.5}} - 18
Formula (extracted LaTeX)
\[\text{BAI} = \frac{95}{1.75^{1.5}} - 18\]
\text{BAI} = \frac{95}{1.75^{1.5}} - 18
Formula (extracted text)
\[ \text{BAI} = \frac{\text{Hip Circumference in cm}}{\text{Height in m}^{1.5}} - 18 \]
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
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