BODY COMPOSITION
Ideal Weight Calculator
Compare Devine, Robinson, Miller, and Hamwi formulas as a realistic range.
Try a preset
Result
Reference Weight Zone
The chart centers the formula midpoint inside the legacy reference band.
How to use it
- Enter height and sex. The output shows a range from multiple formula references (Hamwi, Devine, Robinson, Miller) — this range, not a single number, is the intended output.
- These formulas were developed for medication dosing and anesthesia — they assume average body composition and consistently underestimate appropriate weight for people with above-average muscle mass.
- A person who resistance trains regularly will function optimally 10–20 lbs above what these formulas suggest. Frame the output as an orientation, not a personal target.
- If your weight significantly exceeds the range and you want to reduce, use the Body Fat Percentage Calculator and Calorie Deficit Calculator for actionable, composition-based targets instead.
- The most clinically useful individual target for most people is a BMI of 21–24 adjusted for build and body composition — more meaningful than any formula output.
Questions people usually ask
Which formula is used here?
Shows Devine, Robinson, Miller, and Hamwi formula estimates as a range rather than a single rigid target.
Can I use metric or imperial units?
Yes. This tool supports both metric and imperial units and remembers your preference.
Is this medical advice?
No. This tool provides general fitness estimates and should not replace medical guidance.
Is this tool free and private to use?
Yes. AI Fit Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Do these tools replace medical guidance?
No. These outputs are general fitness estimates — not medical advice.
Can I switch between metric and imperial units?
Yes. Every tool supports both systems and remembers your preference in localStorage.
Related Resources
Learn the decision before you act
Every link here is tied directly to Ideal Weight Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.
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