Devine, Robinson, Miller and Hamwi side by side, with the healthy BMI range for a height
Runs in your browser. Nothing you type is sent anywhere. Checked against sources on 23 Oct 2026.Ideal Weight Calculator applies four population formulas to your height. For a man of 5 ft 10 in, Devine gives 73.0 kg, Robinson 71.0 kg, Miller 70.3 kg and Hamwi 75.0 kg. The WHO healthy BMI range for the same height is 58.5 to 78.7 kg, shown alongside.
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Read the range the four formulas give and the healthy BMI weight ranges, then press Share result.
There is no single ideal weight for a height, and this page does not pretend there is. It shows the four formulas in common use side by side, then sets them against the healthy BMI range for the same height, so you can see how much they disagree.
Each formula starts from a weight at five feet and adds a fixed amount for every inch above it. Hamwi (1964) uses 48 kg plus 2.7 kg per inch for men and 45.5 kg plus 2.2 kg for women. Devine (1974) uses 50 kg and 45.5 kg, each plus 2.3 kg per inch. Robinson and Miller, both published in 1983, lowered the slope: Robinson 52 kg plus 1.9 kg for men and 49 kg plus 1.7 kg for women, Miller 56.2 kg plus 1.41 kg and 53.1 kg plus 1.36 kg.
These are population formulas. None was derived from health outcomes; they were written as convenient reference weights, mostly for calculating drug doses, and Devine is still the one used in hospitals for that purpose. They take no account of frame, muscle, age or ethnicity, and all of them were written for heights of at least five feet. Below that, the page still shows the arithmetic but warns that it is extrapolating.
The healthy BMI range is the more useful figure for most readers, and it is not recalculated here. It comes from this site's BMI calculator, with both the WHO international cut-offs of 18.5 to 24.9 and the lower Asian cut-offs of 18.5 to 22.9, because the two can differ by several kilograms at the same height.
What this tool does not do: it does not tell you what you should weigh, it cannot see body composition, and it does not apply to children or pregnancy. A weight target is a conversation with a doctor or dietitian. This is general information, not medical advice.
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No single figure exists. For a man of 5 ft 10 in, the four common formulas give between 70.3 kg (Miller) and 75.0 kg (Hamwi), and the WHO healthy BMI range for that height runs from 58.5 to 78.7 kg. Anywhere in the BMI range is considered healthy for most adults.
Devine starts at 50 kg for men and 45.5 kg for women at a height of five feet, then adds 2.3 kg for every inch above five feet. A woman of 5 ft 6 in is six inches over, so 45.5 plus 13.8 gives an ideal body weight of 59.3 kg.
Each was written by different authors for different purposes, and none was fitted to health outcomes. Hamwi and Devine climb steeply with height, while Robinson and Miller were published in 1983 as refinements with a gentler slope. At average heights they sit a few kilograms apart; at tall heights the gap widens.
For judging your own weight, the BMI range is more useful because it gives a span tied to observed health risk rather than one point. Ideal body weight formulas are mainly used by clinicians to dose drugs and set ventilators. Both ignore muscle and frame, so neither replaces a clinical assessment.
Not well. All four were written for heights of five feet or more, and below that they subtract weight per inch, which quickly gives implausibly low figures. The page still shows the arithmetic but flags it. For shorter adults, the healthy BMI range is the better guide.
A WHO expert consultation in 2004 found raised cardiovascular and diabetes risk at lower BMI in Asian populations, and Indian guidance sets overweight at 23. The upper healthy weight for a given height is therefore lower on the Asian scale, about 72.4 kg rather than 78.7 kg at 5 ft 10 in.
Rates and rules change; check the source before you rely on a figure.
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