Calculate your ideal body weight using multiple medical formulas (Devine, Hamwi, Robinson, Miller).
This calculator estimates an ideal body weight for your height and sex using well-known clinical formulas (such as the Devine and Robinson equations). These formulas were originally created in medicine, partly to help with medication dosing, and they give a single reference figure. I think the phrase ideal body weight is a little misleading, so I want to frame it honestly: it is a useful reference point, not a target you must hit.
In real life there is no single perfect weight for a given height. Healthy weight is a range, and where you feel and function best within it depends on your build, muscle mass and personal health. With that in mind, this number is a helpful anchor for conversations and goal-setting, used sensibly.
The classic ideal body weight equations (Devine, Robinson, Miller, Hamwi) were developed decades ago, several with medication dosing in mind, and they estimate a weight based mainly on height and sex. They are simple and widely used, which is why you still see them in clinical settings. But they were never meant to define a single correct weight for healthy living, and they do not account for muscle or frame size.
The label suggests there is one right number, and that simply is not how bodies work. A muscular person can sit well above their formula ideal and be very healthy, while the same figure might be high for someone with a lighter build. Healthy weight is genuinely a range for any height. I would treat the calculator's output as the middle of a sensible zone, not a line you have failed to reach.
Used wisely, an ideal body weight estimate is a helpful anchor: it can inform a realistic goal range, support a clinical conversation, or give context to a healthy-weight target alongside BMI and waist measurement. I encourage people to think in ranges (for example, a few kilograms either side of the estimate) and to weigh how they feel, move and function as much as the number itself.
If your current weight sits above the estimate, that is information, not a judgment, and small sustainable changes move things over time. If you are already healthy and active, do not chase a formula for its own sake. The best weight for you is one that supports your health, energy and quality of life, and that is a richer goal than any single ideal number.
This calculator uses established, peer-reviewed formulas and reference ranges from recognized health and nutrition authorities. Results are estimates for general education, not a medical diagnosis. For decisions about your health, consult a qualified clinician. Reviewed by Jennifer Zoned, PhD, Nutrition Researcher.
This calculator uses established clinical formulas such as the Devine and Robinson equations, which estimate a reference weight mainly from your height and sex. These were developed decades ago, several with medication dosing in mind, and they do not account for muscle or frame size.
No. Healthy weight is a range, not a single number, and the best weight for you depends on your build, muscle mass and overall health. The formulas give a reference point, so treat the result as the middle of a sensible zone rather than a target you must hit.
The formulas use only height and sex, so they cannot account for muscle or frame size. A muscular person can sit well above their formula ideal and be very healthy. That is why the number is best used alongside BMI, waist measurement and how you feel and function.
Not necessarily. Think in terms of a healthy range rather than an exact figure, and prioritize how you feel, move and function. If you are already healthy and active, there is no need to chase a formula; if your weight is high, small sustainable changes matter more than a precise target.
