Ideal Weight Calculator — Science-Based Target Weight
Enter your height and sex to see ideal body weight from three clinical formulas — plus the honest healthy-BMI range, which is wider (and kinder) than one magic number.
Quick answer: Free ideal weight calculator: Devine, Robinson and Miller formulas plus the healthy BMI range — get a realistic target weight by height and sex in seconds.
Healthy BMI range (18.5–24.9)
💡 Reference numbers, not verdicts — composition and fitness matter more than any single target.
How to use
- Enter height & sex — metric or imperial, your choice.
- See three formulas — Devine (clinical standard), Robinson and Miller variations.
- Compare with BMI range — the healthy-BMI band shows how wide “normal” really is.
About this tool
“Ideal weight” began as a drug-dosing calculation, not a beauty standard: the Devine formula (1974) still anchors clinical dosing, with Robinson and Miller as refinements. This calculator shows all three for your height and sex, plus the healthy BMI range (18.5–24.9) — which usually spans 15+ kg. Treat the formulas as reference points: body composition, fitness and how you feel beat any single target number.
FAQ
Which formula is “right”?
Doesn't muscle make these wrong?
Why is the BMI range so wide?
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