BAI Calculator - Body Adiposity Index

The calculation relies on an anthropometric equation developed through population studies to estimate percentage body fat. The core formula is expressed as:

BAI = (Hip / Height^1.5) - 18

Where Hip is measured in centimeters and Height is measured in meters. The resulting value correlates closely with overall adiposity across diverse adult demographics, providing a straightforward metric for health monitoring.

Consider an individual with a hip circumference of 105 centimeters and a height of 1.75 meters. To find their Body Adiposity Index, follow these steps:

1. Convert and verify measurements: Hip = 105 cm, Height = 1.75 m.

2. Calculate Height raised to the power of 1.5: 1.75^1.5 ≈ 2.315.

3. Divide the hip measurement by this height value: 105 / 2.315 ≈ 45.35.

4. Subtract 18 from the result: 45.35 - 18 = 27.35.

The resulting Body Adiposity Index is approximately 27.4%, offering an estimate of total body fat composition.

Maintain Consistency: Always measure your hip circumference at the widest part of the buttocks using a flexible, non-stretchable tape measure while standing relaxed.

Correct Units: Ensure height is strictly inputted in meters and hip circumference in centimeters to prevent severe calculation errors.

Track Trends: Rather than focusing on a single isolated measurement, use the calculator periodically to monitor long-term shifts in your body composition.