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Body Adiposity Index (BAI) Calculator

Estimate body fat percentage without a scale using your hip and height.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

This calculator estimates body fat percentage using the Body Adiposity Index (BAI), developed by Bergman et al. in 2011: BAI = (hip circumference / height^1.5) − 18, with hip in cm and height in meters. Unlike BMI, it doesn't require body weight at all — only hip circumference and height, which makes it useful when a reliable scale isn't available or when muscle mass would skew a weight-based estimate.

Researchers and fitness professionals use BAI as a quick screening tool, though it was validated mainly on Mexican-American and African-American adult populations and tends to be less accurate for very muscular people or extreme heights. Enter your hip circumference and height to get an estimated body fat percentage.

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