Ponderal Index Calculator
The ponderal index (also called the Rohrer index) relates your weight to the cube of your height instead of the square used by BMI, a fairer measure for very tall or lean builds, and this free tool shows both numbers side by side.
Enter your details above and the result will appear here.
How to use
- Enter your weight in kilograms.
- Enter your height in centimetres.
- Your ponderal index and BMI for comparison appear instantly.
Note
Ponderal index = weight (kg) / height (m) cubed. Values around 11 to 14 roughly parallel the normal BMI band, but the index has no universally agreed categories — it is shown as an alternative metric only. Estimate only — not medical advice.