HEALTH · IDEAL WEIGHT
Ideal Weight Calculator
Estimate your ideal body weight from height and biological sex using the Devine, Robinson, and Hamwi clinical formulas, in metric or imperial units.
Ideal Weight Range
151.9–158.7 lbs
Across three clinical formulas
Devine (1974)155.4 lbs
Robinson (1983)151.9 lbs
Hamwi (1964)158.7 lbs
About This Calculator
Ideal body weight formulas estimate a reference weight for your height. They originated in clinical settings (notably for medication dosing) and give a useful range rather than a single target.
How It Works
Enter your height and biological sex. The calculator shows three widely used formulas — Devine, Robinson, and Hamwi — and the range across them. All three are based on a baseline weight at five feet plus an increment per inch above it.
The Formula
Devine (kg): men = 50.0 + 2.3·(in − 60) women = 45.5 + 2.3·(in − 60)
- in
- height in inches
- in − 60
- inches above five feet
Frequently Asked Questions
- Which ideal weight formula should I use?
- There is no single correct answer — that is why the calculator shows three. The range they produce is more useful than any one value. Devine is the most commonly cited, especially in clinical dosing.
- Is ideal body weight the same as a healthy weight?
- Not exactly. Ideal body weight formulas are height-and-sex reference points and do not account for body composition or frame size. A BMI healthy-range or body-fat estimate adds important context.
- Why is biological sex required?
- The formulas use different base weights for men and women, reflecting average body composition differences. The field maps to those formula constants.