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The formula
Ponderal Index = weight (kg) ÷ height (m)³
| Example | Calculation | Ponderal Index |
|---|---|---|
| 70 kg, 175 cm | 70 ÷ 1.75³ (5.359) | 13.1 |
| 95 kg, 188 cm | 95 ÷ 1.88³ (6.645) | 14.3 |
Ponderal Index vs. BMI
- BMI divides by height squared, so tall people tend to get higher BMIs for the same build.
- The Ponderal Index divides by height cubed, which matches how body volume grows. It treats tall and short people more evenly.
| What the Ponderal Index shows | What it doesn't show |
|---|---|
| Weight for height, treating tall and short people more evenly | Adult health categories: there are none, so it's mainly used for comparison |
| How thin or heavy a newborn is for its length | How much of your weight is fat and how much is muscle |
| A number that changes less with height than BMI | Where fat is stored, such as around the stomach |
Where it's used
The Ponderal Index is used most in research on babies and children, for example to describe how thin or heavy a newborn is for its length. In adults, it appears in research but not in standard checkups.
Frequently asked questions
What is a normal Ponderal Index for adults?
There are no official adult categories. Most adults fall somewhere around 11 to 15.
Is the Ponderal Index better than BMI?
It handles height differences better, but BMI is what guidelines and doctors use. Compare all measures.
Sources
Kept up to dateLast updated October 9, 2026
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This page is for education and is not medical advice. Talk with a healthcare professional about your weight and health.
