Ideal Weight Calculator
Estimate an ideal weight range from your height using multiple established formulas.
Result
Enter height to estimate an ideal weight range using multiple formulas.
Formulas Used
Hamwi: Men = 48 kg + 2.7 kg per inch over 5 ft. Women = 45.5 kg + 2.2 kg per inch over 5 ft.
Devine: Men = 50 kg + 2.3 kg per inch over 5 ft. Women = 45.5 kg + 2.3 kg per inch over 5 ft.
Robinson: Men = 52 kg + 1.9 kg per inch over 5 ft. Women = 49 kg + 1.7 kg per inch over 5 ft.
Miller: Men = 56.2 kg + 1.41 kg per inch over 5 ft. Women = 53.1 kg + 1.36 kg per inch over 5 ft.
Helpful Interpretation
These formulas are height-based references, not personalized definitions of health or physique quality.
The range is usually most helpful when compared with BMI, body-fat estimates, and real lifestyle goals.
Helpful rule: treat the range as orientation, not as a rigid target that overrides body composition and performance context.
Related Calculators
Height-based weight ranges are more informative when you compare them against body composition, BMI, and real calorie needs.
BMI Calculator
Compare ideal-weight references with a BMI estimate and a healthy-weight range for your height.
Lean Body Mass Calculator
Add body-composition context when a formula-based weight range feels too broad or too generic.
Body Fat Calculator
Check whether scale weight alone is hiding differences in body composition that formulas cannot capture.
Calorie Calculator
Use calorie planning alongside goal-weight thinking so the next phase has a practical nutrition target.
What "Ideal Weight" Really Means
An ideal weight calculator sounds more definitive than it really is. The phrase suggests there is a single correct body weight that every person of a certain height should aim for, but real bodies do not work that way. The more useful interpretation is that ideal weight formulas provide a reference range based on population-level assumptions about height and sex. They can be helpful for orientation, but they are not a direct measurement of health, athletic potential, attractiveness, or the body weight at which you personally function best.
That distinction matters because people often react to these numbers emotionally. If the calculator shows a range below their current body weight, they may feel behind or unhealthy before understanding what the formulas are actually describing. If the number looks lower than expected, they may assume their current muscle mass, bone structure, or training history is being "judged." It is not. These formulas are rough reference tools, not personalized verdicts. They were created to estimate a reasonable body-weight range from height under broad assumptions, not to define the ideal body for every person living today.
Used intelligently, an ideal weight calculator is still useful. It gives context. It helps frame how current body weight compares with historical reference formulas and can support a broader conversation about whether a long-term goal is plausible, conservative, or unrealistic. The mistake is treating the output as destiny. The better move is to treat it as one piece of evidence in a much bigger decision-making process.
Why There Are Multiple Formulas Instead Of One
This calculator includes several common formulas because none of them is perfect and each reflects slightly different assumptions. Hamwi, Devine, Robinson, and Miller all estimate a target body-weight range using height as the main driver, but they do not land on exactly the same answer. That is not a flaw in the calculator. It is evidence that "ideal weight" is not one fixed point. When multiple formulas are shown together, the overlap is often more informative than any single output.
Looking at a range rather than one number also helps prevent overprecision. If four formulas cluster around a similar window, that window becomes the useful insight. It tells you roughly where height-based reference methods tend to place you. The purpose is not to decide that one formula is the winner and every other one is wrong. The purpose is to understand the neighborhood these traditional methods point toward and then interpret that neighborhood using common sense and personal context.
This is especially important because different people carry body weight differently. Bone structure, muscle mass, training history, and even comfort with a certain physique all change how appropriate a reference range may feel in practice. Several formulas shown together are often more honest than a single value because they make the uncertainty visible instead of hiding it.
Where Ideal Weight Can Be Helpful
Ideal weight is most useful at the planning stage, especially for people trying to set long-term goals. If someone is significantly above a healthy or comfortable range and has no idea where to begin, the output can provide orientation. It can help answer questions like, "What might a more moderate long-term target look like?" or "What range do traditional formulas suggest for my height?" That can be valuable when the only other reference points are old college weight, social-media physiques, or arbitrary round numbers.
It can also be useful as a reality check for aggressive goals in either direction. Someone may want to bulk up far beyond what their current frame and training history support, or diet down to a body weight that sounds good emotionally but is not aligned with performance, sustainability, or body composition. The formulas are not there to shut down ambition. They are there to provide perspective. They give you a baseline against which more specialized goals can be compared.
Another useful application is in communication. An ideal weight range can give coaches, clients, or clinicians a neutral reference point when discussing body weight. It is often easier to begin with a broad range than with a loaded statement about whether someone is "too heavy" or "too light." In that sense, the calculator can support a more constructive conversation, as long as everyone remembers what the number is and is not.
Where Ideal Weight Can Mislead You
Ideal weight becomes much less useful when it is interpreted without body-composition context. A muscular person can sit above a formula-based range while remaining lean, healthy, and high-performing. An untrained person can sit comfortably within the range while carrying more body fat than expected. That does not mean the formulas are broken. It means height-based weight estimates cannot tell you what proportion of your body is muscle versus fat. The same scale weight can represent very different physiques.
The output can also mislead people who are highly attached to the idea of reaching a single magic number. When body weight becomes overly symbolic, the person may ignore better indicators such as waist circumference, training capacity, mood, menstrual health, sleep, and diet sustainability. A formula might say one thing while your body, performance, and routine say another. In those moments, the calculator should not win by default.
Another limitation is that historical formulas were developed in specific populations and are not a personalized expression of modern body-composition science. They remain useful as broad references, but they should not be confused with a complete assessment of what is medically ideal or athletically optimal for you as an individual.
How To Use The Range In A Smarter Way
The smartest way to use an ideal weight range is to ask what it helps you decide. If the answer is "it gives me a rough long-term reference," that is productive. If the answer is "it tells me exactly what I must weigh to be healthy or successful," that is usually too rigid. A reference range should open up better questions. How much lean mass do I carry? What body fat range feels sustainable? How is training going? Is my current goal built on body composition and performance, or only on the scale?
This is where combining metrics becomes powerful. Ideal weight is more helpful when it is paired with BMI, body-fat estimates, waist measurements, and real-world lifestyle markers. If several indicators point in the same direction, confidence grows. If they conflict, you learn that a simple height-based formula is not enough on its own. That is not a failure. It is exactly why a broader evaluation is worth doing.
It is also often helpful to use the range to define phases rather than final identity. Maybe the range suggests that losing another ten to fifteen pounds is a reasonable next phase, not that you must eventually live at the exact midpoint forever. That mindset makes the output less emotionally loaded and more practically useful.
A Better Perspective On The Number
Ideal weight calculators work best when they reduce guesswork without taking over your judgment. They can help frame expectations, support long-term planning, and provide a useful height-based reference. But they should not replace what you already know about your own body. If you lift seriously, have an atypical amount of muscle, perform best at a weight outside the formula range, or simply find that your healthiest routine lands elsewhere, that context matters.
In practical coaching terms, ideal weight is a compass, not a destination. It can point in a useful direction, but it does not walk the path for you. Your best body weight is the one that aligns reasonably well with health, body composition, performance, and a lifestyle you can sustain. Sometimes that will sit close to the formula range. Sometimes it will not. The number is helpful when it informs that decision, not when it tries to replace it.
If you use the calculator with that mindset, it becomes a valuable planning tool rather than a source of false certainty. It gives you perspective, not pressure. For most people, that is the most useful role an ideal weight estimate can play.