Why does BMI have units of kg/m^2 when we are three dimensional? Wouldn’t kg/m^3 or g/cm^3 be more accurate?

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Why does BMI have units of kg/m^2 when we are three dimensional? Wouldn’t kg/m^3 or g/cm^3 be more accurate?

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Anonymous 0 Comments

Yes, you are right. The human body actually scales with an exponant of about 2.3. So if someone is 10% larger, they should weigh 1.1^2.3 ≈ 1.25 times as heavy. The fact that you still need a chart to see what BMI is healthy at a certain length is a direct consequence of using the wrong exponent in the formula.

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