Ideal Weight Calculator
A healthy-weight range from BMI and the classic formulas.
Healthy weight range (BMI 18.5–24.9)
111.2–149.6lb
Classic ideal-weight formulas
Devine
125.7lb
Robinson
126.8lb
Miller
132.1lb
Hamwi
124.6lb
“Ideal weight” is a rough target, not a verdict — these formulas ignore muscle, frame, and body composition. The BMI range up top is the more useful goalpost, and on a GLP-1 your body-fat and waist trends matter more than any single number.
“Ideal weight” is a range, not a number
The healthiest way to set a target is the weight range for a BMI of 18.5–24.9 at your height. The older ideal-weight formulas — Devine, Robinson, Miller, and Hamwi — each spit out a single number based on height and sex, which is why they disagree with each other.
Why body composition matters more on a GLP-1
None of these formulas know how much of you is muscle. On a GLP-1, protecting lean mass is the whole game, so your waist measurement and body-fat trend are better guides than any “ideal weight.” Use the range as a direction, not a destination.
Frequently asked
- What is a healthy weight for my height?
- The range corresponding to a BMI of 18.5–24.9 for your height. Enter your height above to see it in pounds or kilograms, alongside the classic formula estimates.
- Which ideal-weight formula is best?
- None is authoritative — they are simplifications that ignore muscle and frame. The BMI range is more useful as a goal, and body composition matters most on a GLP-1.
Medical disclaimer. Tiro is a tracking companion, not a medical device, and nothing on this site is medical advice. Always follow the titration schedule and dosing instructions from your prescriber. Never change your dose without talking to them first.