How it works
Robinson, Miller, Devine, and Hamwi are historical equations based primarily on height and sex. Their spread illustrates that there is no single scientifically exact “ideal” weight.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?unitSystem=UnitsChoice · Required · Default: imperial · Accepted values: metric, imperial
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?sex=Sex used by equationChoice · Required · Default: male · Accepted values: male, female
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?heightCm=HeightNumber · Required · Default: 178 · Used when unitSystem = metric
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?feet=Height feetNumber · Required · Default: 5 · Used when unitSystem = imperial
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?inches=Height inchesNumber · Required · Default: 10 · Used when unitSystem = imperial
Outputs
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averageAverage formula resultText · Primary output
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devineDevine formulaText
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robinsonRobinson formulaText
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millerMiller formulaText
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hamwiHamwi formulaText
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healthyRangeBMI healthy-weight rangeText
Better context
The healthy-BMI interval is shown separately. Body composition, health history, age, and personal circumstances are not captured by these equations.