Ideal Weight Calculator
See your ideal weight by multiple formulas, a healthy range, and a safe goal roadmap.
Suggested range: —
healthy targetBy formula
Where your current weight sits
Goal roadmap
How to use the Ideal Weight Calculator
Step 1 — Pick sex & units
- These select the correct formula constants.
Step 2 — Enter height
- Height drives every ideal-weight formula.
Step 3 — Add current weight
- Optional — unlocks a "where you sit" bar and goal roadmap.
Step 4 — Review & export
- See the range, the per-formula table, and download a PDF.
Frequently asked questions
The four classic clinical formulas — Devine, Robinson, Miller and Hamwi — plus the healthy-BMI range for your height. Showing them together gives a sensible band rather than one disputable figure.
They were derived from different populations and decades, so each gives a slightly different number. That spread is the point: it shows your ideal weight is a range, not a single value.
No — that is their main limitation. They use only height and sex, so very muscular or large-framed people will read low. Use the range as a guide and consider body composition alongside it.
If you enter your current weight, the tool shows whether you are within, above or below the suggested range and estimates a safe timeline to reach it at about 0.5 kg per week.
No — everything is calculated in your browser and nothing is uploaded. This tool gives general information for education, not medical advice; consult a qualified healthcare professional for guidance about your health.
About the Ideal Weight Calculator
This tool estimates a healthy target weight for your height and sex using the four best-known clinical formulas — Devine, Robinson, Miller and Hamwi — shown alongside the healthy range derived from BMI. Instead of one debatable number, you get a sensible band to aim for, plus an optional roadmap if you enter your current weight.
Why several formulas, not one
Each "ideal weight" formula was created at a different time from a different population, originally to help with medication dosing, so they never fully agree. Rather than hide that, this tool shows all of them together — and the gap between them carries the real lesson: there is no single perfect weight, only a healthy range within which most people thrive. Combining the formulas with the healthy-BMI span produces a band that is more trustworthy than any one figure.
Read it with its limits in mind
These formulas use only height and sex. They take no account of muscle mass, frame size, age or body composition, so a muscular athlete can come out "overweight" by them while sitting at a very healthy body fat. Treat the range as a useful reference point, not a verdict, and weigh it against how you feel and move, your waist measurement, and your body-fat estimate. If you provide your current weight, the goal roadmap keeps any change safe by assuming a gradual 0.5 kg per week.
Private and practical
Everything runs in your browser and nothing is uploaded. This tool gives general information for education, not medical advice; consult a qualified healthcare professional for guidance about your health. For a fuller composition picture use the Advanced BMI Calculator (which also shows these formulas in context) and the Body Fat Calculator.