Health & Fitness100% Free Tool

Free Body Adiposity Index (BAI) Calculator (Hip-to-Height) Online

Calculate Body Adiposity Index (BAI = (Hip Circumference / (Height)^1.5) - 18) to estimate body fat percentage without weighing scales. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.

100% Client-Side0ms Latency
Clinical Health & Anthropometrics
WHO Classification:Normal Healthy Weight
1618.525.030.040+
BMI Score22.9
Maintenance TDEE2281 kcal/day
Daily Protein Target126g / day

How It Works

1

Enter Height

Input height in meters or centimeters.

2

Enter Hip Circumference

Measure around the widest part of the buttocks and hips in cm.

3

Evaluate BAI Formula

Formula: (100 × Hip / Height^1.5) - 18.

4

Inspect Body Fat Classification

Review estimated body fat percentage category (Healthy, Overweight, Obese).

Frequently Asked Questions

Developed by researchers at the University of Southern California as an alternative to BMI that directly estimates body fat percentage using hip circumference without requiring bodyweight.

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