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Ideal Weight Calculator

Compare several established ideal-weight formulas using height and sex.

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About the tool

What it does and what to expect

Compare established reference formulas

Clinicians and researchers historically used formulas such as Devine, Robinson, Miller, and Hamwi to estimate reference weight from height and sex, often for medication or clinical calculations. They are rough population formulas, not a definition of health or appearance.

A worked example

For a 175 cm male, the four formulas produce slightly different estimates, creating a range rather than one supposedly perfect number. The comparison makes that uncertainty visible instead of presenting a single formula as absolute.

How it works

A simple, local workflow

  1. 1Select the sex used by the historical formulas and enter height in centimetres.
  2. 2Height above five feet is converted to inches and inserted into four established equations.
  3. 3Compare the individual formula values and the overall range, treating them as reference points only.

FAQs

Common questions

Why do ideal-weight formulas give different answers?

Each formula was developed with different assumptions and coefficients, so their estimates naturally vary.

Do these formulas account for muscle mass or body frame?

No. They use only height and sex and do not directly measure muscle, fat distribution, age, or frame size.

Is ideal weight the same as a healthy weight?

Not necessarily. Health cannot be determined from one formula, and a qualified professional can interpret weight alongside broader clinical context.

Comments & feedback

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