What this calculator does
A Body Shape Index (ABSI) works out waist circumference adjusted for height and BMI, an alternative to the waist-to-height ratio. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
The inputs explained
| Field | What to enter |
|---|---|
| Waist circumference (cm) | A number, measured in cm. Starts at 85. |
| Height (cm) | A number, measured in cm. Starts at 175. |
| Weight (kg) | A number, measured in kg. Starts at 75. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with waist circumference
Every other input is held at the calculator’s starting values while waist circumference varies. Select any row to load that scenario into the calculator.
| Waist circumference (cm) | ABSI | BMI used | Reading |
|---|---|---|---|
| 42.5 | 0.0381 | 24.5 | Higher ABSI for your BMI has been linked to higher health risk in population studies; it is not a diagnosis. |
| 63.75 | 0.0571 | 24.5 | Higher ABSI for your BMI has been linked to higher health risk in population studies; it is not a diagnosis. |
| 85 | 0.0762 | 24.5 | Higher ABSI for your BMI has been linked to higher health risk in population studies; it is not a diagnosis. |
| 128 | 0.1147 | 24.5 | Higher ABSI for your BMI has been linked to higher health risk in population studies; it is not a diagnosis. |
| 170 | 0.1524 | 24.5 | Higher ABSI for your BMI has been linked to higher health risk in population studies; it is not a diagnosis. |
| 255 | 0.2286 | 24.5 | Higher ABSI for your BMI has been linked to higher health risk in population studies; it is not a diagnosis. |