Find your ideal body weight by height and sex using the Robinson, Miller, Devine, and Hamwi formulas, plus the healthy weight range from BMI.
| Formula | Ideal weight |
|---|---|
| Robinson (1983) | — |
| Miller (1983) | — |
| Devine (1974) | — |
| Hamwi (1964) | — |
Ideal body weight (IBW) is an estimate of a healthy weight based on your height and sex. It originated in medicine for dosing and clinical assessment, and several formulas exist because researchers refined the idea over the decades. None is a single "correct" answer — together they give a sensible target range rather than one exact number.
The Robinson, Miller, Devine, and Hamwi formulas each return a single ideal weight, and they cluster closely together. The healthy BMI range (a BMI of 18.5 to 24.9 for your height) gives a wider, equally valid window. Because these methods only use height and sex, they don't account for muscle mass or frame size — a muscular person may sit healthily above their "ideal" number.