Use the calculator tabs to compute the Abdominal Volume Index (AVI) from waist and hip circumference, or to compute waist-to-height ratio (WHtR) from waist and height.

Abdominal Volume Index Calculator

WHtR (%) (solve for missing)
AVI (waist & hip)
WHtR (ratio)

Enter any 2 values to calculate the missing variable




Disclaimer: This calculator provides educational, screening-style estimates and does not diagnose any condition. Cutoffs can vary by age, sex, ethnicity, and health status, and may not apply to children or during pregnancy. If you have symptoms or concerns, discuss results with a qualified clinician.

For additional context, look for peer-reviewed research describing the AVI formula and WHtR screening thresholds, and consult major public-health resources (for example, CDC/NIH guidance) for healthy weight and cardiometabolic risk information.

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Abdominal Volume Index Formula

The following formula is used to calculate the Abdominal Volume Index (AVI) for a given waist circumference and hip circumference.

AVI = \frac{2 \times WC^2 + 0.7 \times (WC - HC)^2}{1000}

Variables:

  • AVI is the Abdominal Volume Index
  • WC is the waist circumference in centimeters
  • HC is the hip circumference in centimeters

To calculate AVI, square the waist circumference and multiply by 2, add 0.7 times the squared difference between waist and hip, and then divide the total by 1000.

What is Abdominal Volume Index?

The Abdominal Volume Index (AVI) is an anthropometric index used to estimate abdominal obesity using waist and hip circumference measurements. Higher AVI values generally indicate greater central (abdominal) fat accumulation, which is associated with increased risk for cardiometabolic conditions such as type 2 diabetes and cardiovascular disease. (Waist-to-height ratio is a different metric and is calculated from waist and height.)

How to Calculate Abdominal Volume Index?

The following steps outline how to calculate the Abdominal Volume Index.

  1. First, measure the waist circumference (WC) in centimeters.
  2. Next, measure the hip circumference (HC) in centimeters.
  3. Finally, calculate AVI using the formula: AVI = [2 × WC² + 0.7 × (WC − HC)²] / 1000.
  4. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Waist Circumference (WC) = 80 cm

Hip Circumference (HC) = 95 cm

Using the formula AVI = [2 × WC² + 0.7 × (WC − HC)²] / 1000, the Abdominal Volume Index can be calculated as follows:

AVI = [2 × 80² + 0.7 × (80 − 95)²] / 1000 = [12800 + 157.5] / 1000 = 12.96