UNDERSTAND THE METHOD
How to use this calculator
Enter height, weight, waist, and age. ABSI adjusts waist for height and weight. The z-score expresses the distance from the original age- and sex-specific reference mean in standard deviations. This tool uses completed whole years and the original Table S1 values. The age-85 row represents adults 85 and older and was not smoothed.
What the result can tell you
ABSI is a screening index, not a diagnosis or lifespan estimate. The original mortality study included adults aged 18 and older. Study hazard ratios describe groups and do not predict an individual chance of death. The original source does not provide the continuous mortality curve used by some calculators.
Common questions
What measurements does ABSI use?
Enter height, weight, waist, and age. ABSI adjusts waist for height and weight, then compares the result with the age- and sex-specific reference data.
Does ABSI predict my lifespan?
No. ABSI is a screening index. The source hazard ratios describe groups and do not predict an individual lifespan or chance of death.
Sources & limitations2 sources
Sources checked September 12, 2026. These notes identify methods and assumptions. They have not received an independent clinical review.