Understand your waist and hip measurements.
Waist 90 cmHip 100 cm
Two measurements. One useful index.
The Abdominal Volume Index combines waist and hip circumferences into a research-based estimate related to abdominal shape. Photo placement is illustrative.
ABDOMINAL VOLUME INDEX
16.3Based on waist 90 cm and hip 100 cm
Your AVI in context
Reference thresholds vary by study and population.
AVI is a research index, not a diagnosis. The scale is illustrative; values can fall outside its displayed range.
Step-by-step solution
Use centimetres
Waist = 90 cm; hip = 100 cm.
Substitute your measurements
[2 × 90² + 0.7 × (90 − 100)²] / 1,000
Calculate
(16,200 + 70) / 1,000 = 16.27
Round the displayed result
AVI = 16.3. WHR = 90 / 100 = 0.90.
Understanding AVI
AVI = [2 × waist² + 0.7 × (waist − hip)²] / 1,000
Use measurements in centimetres.AVI is a geometric research estimate using waist and hip measurements. It combines the size of your waist with the difference between your waist and hips.
It does not distinguish fat from muscle or measure body fat percentage. Interpret it alongside other measurements and clinical context.
The original 2003 study reported a 24.5 threshold for its own sample. It should not be treated as a universal diagnostic cut-off.
Frequently asked questions
What does AVI estimate?
AVI combines waist and hip circumferences into a geometric research estimate of overall abdominal volume. It is not an imaging measurement of visceral fat.
How do I measure my waist and hips?
Use a flexible, non-stretch tape. Keep it horizontal and snug without compressing skin. Follow a consistent measurement protocol: WHO waist guidance uses the midpoint between the lowest palpable rib and the top of the iliac crest, after a normal exhalation. Measure hips at the widest circumference over the buttocks. Measurement sites can differ between studies.
Is AVI a diagnostic test?
No. AVI alone cannot diagnose diabetes, insulin resistance, metabolic syndrome or obesity. A clinician interprets measurements alongside medical history, other measures and, when appropriate, laboratory tests.
Why can reference thresholds differ?
Thresholds depend on the population, measurement method and outcome studied. The original 2003 study reported a 24.5 threshold for its sample; that is not a universal clinical boundary. This page does not assign a disease risk category.
What does the Abdominal Volume Index calculate?
Understand your waist and hip measurements.
Which values should I enter?
Enter the values requested by the calculator using the labels and units shown on the page.
What formula does this calculator use?
The calculator uses the following relationship: AVI = [2 × waist² + 0.7 × (waist − hip)²] / 1,000. Use centimetres. WHR = waist / hip..
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.
Sources & references
Medical ResearchGuerrero-Romero & Rodríguez-Morán (2003)Original AVI research · View study
Waist and hip measurement guidanceMeasurement technique · View referenceReferences inform the calculation; no institutional endorsement.