Ideal Weight Calculator
Estimate your ideal body weight using multiple scientific formulas.
Updated
Ideal Weight Formulas
There is no single "ideal weight" — different formulas give different estimates. The most commonly used are the Devine, Robinson, Miller, and Hamwi formulas. All are based on height and sex, and provide a general guideline rather than a definitive target.
BMI-based healthy weight range (BMI 18.5–24.9) is often considered the most practical reference. Always consult a healthcare provider for personalized advice.
Frequently Asked Questions
How is ideal weight calculated?
This calculator shows four established formulas — Devine, Robinson, Miller, and Hamwi — which each estimate a healthy weight from your height and sex. Comparing them gives a sensible range rather than one absolute number.
Why do the formulas give different answers?
Each was derived from different populations and eras (Devine's, for instance, was created for drug dosing in 1974). The spread between them is a feature — treat it as your target zone.
Is there a single ideal weight for my height?
No. A healthy weight is a range influenced by muscle mass, frame size, age, and body composition. The BMI healthy range (18.5–24.9) for your height is another good reference band.
Should I aim for the exact number shown?
Use it as a directional guide, not a goal. Body composition, fitness, and lab markers say far more about health than hitting a formula's output to the pound.