What's Your Ideal Weight? A More Useful Way to Think About It

Why there is no single magic number

If you have ever typed “what is my ideal weight” into a search engine, you are not alone. It is one of the most common health-related questions people ask, and the answer they usually get is a single number pulled from a generic chart. But here is the truth that took me years of coaching — and my own complicated relationship with food growing up in the Philippines — to fully understand: there is no single magic number that defines your health.

As a diet and lifestyle coach, I work with people every day who feel defeated by a number on the scale. They compare themselves to charts, to friends, to the version of themselves from ten years ago. What I try to help them see is that “ideal weight” is not a destination. It is a range, influenced by your height, your frame, your muscle mass, your genetics, and so much more.

This article is for education, not diagnosis. If you have concerns about unexplained weight change, eating patterns, body image, menstrual changes, medication effects, or weight-related health conditions, please bring those concerns to your GP or healthcare provider. A calculator can offer context. It cannot tell you what your individual body needs medically.

Starting with the basics: ideal weight formulas

Several well-known medical formulas attempt to estimate an ideal body weight based on your height and sex. The Devine formula, the Robinson formula, the Miller formula — each was developed in a specific clinical context, often for calculating drug dosages rather than setting personal health goals. They give you a ballpark, and that ballpark can be genuinely useful as a reference point. But it is just that: a reference.

Try entering your details into the Ideal Body Weight Calculator to see what these formulas suggest:

You will notice the calculator shows a range rather than one absolute number. That is intentional. Bodies are wonderfully diverse. Two people of the same height can have very different builds, carry muscle differently, and be equally healthy at different weights.

If the range surprises you — whether it feels too high or too low — take a breath. This result does not diagnose anything, and it does not tell you where your body “should” be tomorrow. What it can do is give you a reference band to compare against other markers. If you are already in that range, it may reassure you that your target does not need to be more aggressive. If you are outside it, that is not automatically a problem, but it may be a prompt to look at the rest of the picture rather than focusing only on the scale.

Understanding BMI: useful but limited

Body Mass Index is probably the most widely referenced weight metric in healthcare. It divides your weight by the square of your height to produce a single number, and that number is slotted into categories like “underweight,” “normal,” “overweight,” and “obese.” Doctors use it because it is fast and easy to calculate across large populations.

But BMI has real limitations. It does not distinguish between muscle and fat. It does not account for bone density, age, sex differences in body composition, or ethnic variation. The CDC describes BMI as a screening tool, not a diagnosis, and the NHS makes the same point: it is useful for many adults, but not accurate for everyone. Research and clinical guidance also show that some ethnic groups, including many Asian populations, can face metabolic risk at lower BMI thresholds. Growing up in a Filipino household, I saw firsthand how body shapes varied enormously among relatives who were all perfectly healthy.

That said, BMI still offers a useful starting point. If your BMI is significantly outside the typical range, it can be a prompt to have a deeper conversation with your doctor — not a reason to panic, but a reason to be curious.

Use the Body Metrics Calculator to check where you fall on the BMI scale:

When you look at your BMI result, pair it with context. A higher BMI in a very muscular person does not mean the same thing as a higher BMI alongside high blood pressure, poor sleep, rising blood sugar, and increasing waist circumference. In the same way, a BMI in the “healthy” range does not automatically mean everything is optimal if you are feeling weak, undernourished, or dealing with symptoms that deserve attention.

That is why clinicians rarely stop at BMI alone. Waist circumference, blood pressure, blood sugar, cholesterol, fitness, sleep, and how you actually feel in your body all matter. If a calculator result worries you, the next step is not shame. It is better information.

Your body type matters more than you might think

One thing I wish more people talked about is body type — or somatotype, if you want the technical term. The concept groups body builds into three broad categories: ectomorph (naturally lean, longer limbs), mesomorph (muscular, medium frame), and endomorph (wider frame, stores fat more easily). Most of us are actually a blend of two types.

Understanding your body type is not about labelling yourself or deciding what you “should” look like. It is about context. If you have a naturally broader frame and denser bones, your comfortable weight range may be higher than someone with a narrower build — and that is completely fine.

I do want to be careful here, though: body-type tools are not the same thing as a medical assessment. They can be a helpful way to think about build and proportions, but they cannot diagnose your metabolic health, tell you how much body fat you carry, or decide what weight is healthiest for you on their own. Treat this as a descriptive tool, not a verdict.

The Body Type Calculator can help you get a sense of your natural build based on your measurements:

If the result confirms what you already suspected — perhaps that you are naturally more slight, or naturally more solidly built — use that information gently. It can help you stop chasing a body shape that was never realistic for you in the first place. That is valuable. But if you want to understand health risk more clearly, body composition, waist measurements, fitness markers, and lab work will usually tell you more than somatotype labels alone.

Putting it all together: a gentler framework

So if no single number can define your ideal weight, how should you think about it? Here is the framework I use with my clients:

• Look at the range, not the point. All three calculators above give you ranges or categories. Your healthy weight exists somewhere within that range, and it can shift over time with age, activity level, and life changes like pregnancy or menopause.
• Pay attention to how you feel. Do you have energy throughout the day? Can you move comfortably? Are you sleeping well? These functional markers often tell you more about your health than any scale ever could.
• Consider your full picture. Blood pressure, blood sugar, cholesterol, waist circumference, mental health, stress levels, and sleep quality — these are the things that actually predict long-term health outcomes. Weight is one data point among many.
• Be sceptical of transformation culture. Social media is full of before-and-after photos and rigid meal plans. But sustainable health is not built on restriction and shame. It is built on consistent, gentle habits — eating enough vegetables, moving your body in ways you enjoy, drinking water, getting rest, and being kind to yourself on the days you eat an extra serving of your lola’s pancit.

If you want a practical way to use the calculators, try this:

1. Use the ideal-weight calculator to get a broad reference range.
2. Use BMI as a quick screening number, not a final conclusion.
3. Use the body-type result only as build context, not as proof of health or ill health.
4. Then ask whether your everyday health markers support what the calculators suggest.

A note on cultural context

In many cultures, including the one I grew up in, food is love. It is community. It is celebration. I never want anyone to feel like pursuing health means rejecting the foods and traditions that connect them to their family and heritage. The goal is balance, not perfection. You can honour your culture and nourish your body at the same time.

Your ideal weight is not a single number on a chart. It is the weight at which you feel strong, energised, and able to live the life you want. Use these tools as a starting point — and then keep going, with curiosity and compassion, from there.