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Your ABSI Result
The z-score is a broad adult reference estimate using the original ABSI paper's overall mean and standard deviation. It is not age- or sex-specific.
An ABSI calculator estimates A Body Shape Index, a body-shape measurement that uses waist circumference together with height and weight. BMI can show whether weight is high or low for a person's height, but it does not show where body mass is carried. ABSI adds waist size to give a more focused view of central body shape.
ABSI Formula
The standard ABSI equation uses waist circumference and height in meters, and BMI in kg/m2.
In this formula, BMI = weight / height2. The calculator automatically converts centimeters, kilograms, inches, and pounds into the correct units before calculating the result.
How to Use This ABSI Calculator
- Select Metric or US Units.
- Enter your height, weight, and waist circumference.
- Read your ABSI score, BMI, waist-to-height ratio, and broad reference comparison.
How to Measure Waist Circumference
For a more consistent result, stand relaxed, breathe normally, and measure around your waist with a flexible tape. Keep the tape level, snug, and not pressed into the skin. If you track ABSI over time, measure in the same way each time.
ABSI vs BMI
BMI is simple and useful for a quick body-weight category, but it does not separate muscle, fat, or fat distribution. ABSI is designed to compare waist size against what may be expected for a given height and BMI. A higher ABSI can suggest more central body shape for the same BMI, while a lower ABSI can suggest a smaller waist for the same height and weight.
Important Health Note
This ABSI calculator is for education and general wellness tracking only. It does not diagnose disease or replace advice from a doctor, dietitian, or qualified healthcare professional. For personal health decisions, use ABSI together with medical history, blood pressure, blood tests, lifestyle factors, and professional guidance.
Frequently Asked Questions
What is a good ABSI score?
There is no single perfect ABSI number for everyone. ABSI is best understood as a comparison score. A lower value usually means waist size is smaller relative to height and BMI, while a higher value means waist size is larger relative to height and BMI.
Does ABSI replace BMI?
No. ABSI is complementary to BMI. BMI describes weight relative to height, while ABSI adds waist circumference to better reflect central body shape.
Can ABSI be used for children?
This calculator is intended for adults. Children and teenagers need age-specific growth references, so pediatric measurements should be interpreted by a qualified healthcare professional.
Reference: Krakauer NY and Krakauer JC introduced ABSI in the 2012 PLoS ONE paper A New Body Shape Index Predicts Mortality Hazard Independently of Body Mass Index.