Body Adiposity Index (BAI) Calculator

BAI Scientific Analyzer

A calculator based on the research of Bergman et al. (2011) that contextualizes results based on population demographics and athlete status.

Anthropometric Data

Gender

Female Male

Height (cm)

Hip Circ. (cm)

At widest part of buttocks

Ethnicity (for Validation)

Training Status

I am an Athlete / Resistance Trainee Regular hypertrophy training (squats, sprints, etc.)

Enter your measurements to generate a
scientific body composition analysis.

Population Group	Verdict	Clinical Recommendation
African-American & Mexican-American	High Accuracy	Reliable surrogate for body fat tracking.
Athletes / Resistance Trainees	Poor Accuracy	Avoid BAI. Use Waist-to-Height Ratio.
Caucasian / European	Mixed / Lower	Likely underestimates fat %.
Severe Obesity (BMI > 35)	Ineffective	Linear formula breaks down. Use BMI.

Disclaimer: This tool provides estimates based on population studies. It is not a medical diagnosis.
Formula: BAI = (Hip_cm / Height_m^1.5) – 18