Several long-standing medical formulas estimate an "ideal" body weight from height alone, originally developed for clinical purposes like medication dosing rather than as a personal fitness target. This tool calculates the three most commonly referenced ones — Devine, Robinson, and Miller — side by side so you can see how they compare.
All three formulas take a base weight for 5 feet of height and add a fixed amount per inch above that, though the base and increment differ slightly between formulas, producing a modest range rather than one single number.
These formulas don't account for muscle mass, bone structure, or body composition, so they're best treated as a rough historical reference point rather than a personal health target — a fitness or medical professional can offer guidance more tailored to your individual situation.
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Frequently asked questions
Which formula is most accurate?
None is definitively "more correct" — they were developed for different clinical contexts and purposes, which is why this tool shows all three rather than picking one.
Should I aim for this exact weight?
These formulas don't account for muscle mass, frame size, or individual health context, so they're a general reference rather than a personal target — a healthcare provider can offer more relevant guidance.