Why use height cubed instead of squared?

Body mass scales more closely with volume (roughly height cubed) than with height squared, which makes the ponderal index less distorted than BMI for people at height extremes.

Ponderal Index Calculator

The ponderal index is similar to BMI but uses height cubed instead of squared, making it more proportionally accurate for very tall or very short individuals.

Inputs

Results

Ponderal Index: 13.06 kg/m³

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Formula

PI = Weight(kg) / Height(m)³

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Body Composition Indices Beyond BMI

Body Adiposity Index, BMI Prime, Ponderal Index, waist-to-height ratio, and FFMI — five alternative ways to assess body composition.

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