Estimate body fat percentage from hip circumference and height, without needing a scale.
How It Works
How Body Adiposity Index Calculator Works
BAI was developed as an alternative to BMI that doesn't require stepping on a scale — it estimates body fat using just hip circumference and height, on the idea that hip size correlates with body fat percentage in adults.
Worked Example
See It In Action
A height of 1.8 m and hip circumference of 102 cm gives a BAI of about 24.2, which falls in the range generally considered a healthy body fat level.
FAQ
Frequently Asked Questions
How is this different from BMI?
BMI uses height and weight, while BAI uses height and hip circumference instead of weight — it was designed as an option for situations where a reliable scale isn't available.
Is BAI more accurate than BMI?
Neither is a direct measurement of body fat — both are estimates, and studies have found mixed results on which correlates better with actual body fat across different populations, so treat either as a general indicator rather than a precise reading.
