Ideal Weight Calculator

This calculator estimates ideal weight using several established formulas, including the Robinson, Miller, Devine, and Hamwi methods, which each use your height and sex to suggest a target range. Because these formulas were developed for different purposes and populations, they produce slightly different results, which is why the tool shows a range rather than a single number. Presenting multiple methods gives a more balanced picture than relying on any one formula, and helps you see a realistic healthy band rather than a single rigid figure.

Each ideal-weight formula was created at a different time, for different reference groups, and with different assumptions about body composition. The Hamwi and Devine formulas, for instance, originated in clinical dosing contexts, while others were refined for broader use. None accounts for individual differences in muscle mass, bone density, or body frame. Seeing the spread between formulas is useful because it reminds you that healthy weight is a range, not a precise target.

No. Standard ideal-weight formulas use only height and sex, so they cannot distinguish between muscle and fat or adjust for a naturally larger or smaller frame. A very muscular person may exceed the suggested range while carrying little excess fat, and someone with a slight frame may sit comfortably below it. For a fuller picture, combine ideal-weight estimates with measures such as body-fat percentage and waist circumference.

Not exactly. Ideal-weight formulas offer a useful reference, but a healthy weight depends on many factors including body composition, fitness, age, and overall health. Two people at the same weight can have very different health profiles. Rather than fixating on a single number, it is generally more helpful to focus on healthy habits, sustainable nutrition, regular activity, and guidance from a healthcare professional.

Treat the result as a general reference range to inform goal-setting, not as a strict prescription. If your current weight sits well outside the suggested range, it may be worth discussing with a doctor or dietitian who can consider your full circumstances. Use the figure to set realistic, gradual targets, and remember that body composition and how you feel often matter more than hitting an exact number on the scale.