Ponderal index calculator
BMI divides by height squared, which systematically calls tall people heavy. The ponderal index divides by height cubed instead.
Ponderal index
13.06kg/m3
- BMI for comparison
- 22.86 kg/m2
Show the working
- Weight = 70
- Height = 175
- h_m = 175 / 100 = 1.75
- Ponderal index = 70 / 1.75^3 = 13.0612
- BMI for comparison = 70 / 1.75^2 = 22.8571
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- PI = weight in kg / (height in m)^3
Typical adult values run from about 11 to 15 kg/m3.
This is a population formula, not a diagnosis. Individual metabolism, body composition and medical history all move the real answer, so treat the number as a starting point and talk to a clinician about anything that matters.