Healthy weight range: what it tells you
What the healthy weight range means, why BMI and waist size each tell part of the story, and what to raise with your practitioner. Read on, then book a consult.
Bio Chain Clinic Updated 7 min read
The healthy weight range is a guide, and it’s a rough one. For most adults, it means a body mass index (BMI) between 18.5 and 24.9. That number can’t see muscle, and it can’t see where your weight sits. So it’s most useful next to a waist measurement and a conversation about your life.
Key points
- A BMI of 18.5 to 24.9 is the adult healthy weight range used by Healthdirect.
- BMI is less accurate for athletes, weightlifters, pregnant women, people under 18 and some ethnic groups.
- Your waist measurement adds what BMI misses: how much fat you carry around your middle.
- Genetics, sleep, shift work, stress and where you live all shape weight. Willpower is one small part.
What is the healthy weight range?
For Australian adults, the healthy weight range is a BMI of 18.5 to 24.9. Below 18.5 counts as underweight. From 25 to 29.9 counts as overweight, and 30 or more sits in the obese range. To work out your BMI, divide your weight in kilograms by your height in metres, squared. Healthdirect’s BMI calculator does the sums for you.
The range was built for whole populations. It helps public health teams spot trends across millions of people. For one person, it’s a starting point for a talk, and nothing more final than that.
Why BMI only tells part of the story
BMI can’t tell fat from muscle, so it can misread some bodies. Muscle weighs more than fat. A person who lifts weights 4 days a week can land in the overweight band with very little body fat. Healthdirect lists the groups where BMI is less accurate: some high-performance athletes, body builders and weightlifters, pregnant women, people with a physical disability and people under 18.
It’s also less accurate for some ethnic groups. These include Aboriginal and Torres Strait Islander peoples, Pacific Islanders, Māori, South Asian, Chinese and Japanese people.
In 2025, a Lancet commission of 58 clinicians and researchers went further. It said BMI should be used to screen populations, rather than as a measure of one person’s health. It recommended adding at least one body measurement, such as the waist.
How to measure your waist
Measure halfway between your lowest rib and the top of your hip bone, roughly in line with your belly button. Put the tape on bare skin or one light layer. Breathe out normally, then read the tape while it sits snug but not tight. That’s the method Healthdirect describes.
Waist size is a guide to visceral fat, the fat that coats your organs. Healthdirect links it to a higher chance of heart disease and type 2 diabetes. These are the adult thresholds it uses:
| Measurement | Increased risk | Greatly increased risk |
|---|---|---|
| Women | 80cm or more | 88cm or more |
| Men | 94cm or more | 102cm or more |
The waist and BMI don’t always agree. The Australian Bureau of Statistics found that in 2022, 65.8% of adults were above the healthy BMI range. But 67.9% had a waist measurement linked to increased risk, up from 62.9% in the 2011-12 survey.
The average adult waist was 95.1cm: 99.3cm for men and 91.0cm for women. Some people sit inside the healthy weight range and still carry weight around the middle.
What affects your weight besides food and exercise?
Weight is shaped by many things, and some of them are outside your control. Healthdirect names genetics, metabolism, and medical conditions and disabilities. It also lists where you live and work, shift work, not sleeping enough and stress. The ABS notes that genetic and environmental factors play a role too.
Think about a nurse on rotating night shifts, or a parent who sleeps 5 hours a night. Their days pull against the standard advice in ways a meal plan won’t fix. Healthdirect puts it plainly: it’s not always possible to control the reasons your BMI or waist is high.
How weight stigma gets in the way of care
Blame makes care worse, and the research backs that up. In 2020, an international group of health professionals and researchers published a consensus statement in Nature Medicine. It found that weight stigma can cause physical and psychological harm. People who face it are also less likely to receive adequate care.
If a visit leaves you feeling ashamed, it’s harder to book the next one. We think a weight conversation should feel like any other health conversation: calm, practical and about you as a whole person.
What your practitioner looks at in a weight consultation
In a weight management consultation, your practitioner looks at the whole picture before the scales. They’ll usually ask about:
- your weight history and what you’ve tried before
- how you sleep, and how many hours you get
- your work pattern, stress and daily routine
- any health conditions, and your family history
- how and when you eat, and how active you are
They may talk through your BMI and waist measurement together. If they think blood tests would help, they’ll explain why first. You can read more about why bloods sometimes come first.
From there, your practitioner might give advice on sleep, food or activity. They might suggest more tests, or a referral to a dietitian or exercise physiologist. Sometimes the right answer is to keep doing what you’re doing.
Questions people ask about healthy weight
Is BMI accurate if I lift weights?
Often it isn’t. BMI only uses your height and weight, so it can’t tell muscle from fat. People who train hard or lift weights can read as overweight with little body fat. A waist measurement gives a fuller picture. Your practitioner can look at both numbers alongside your training history.
Can I be in the healthy weight range and still have a high waist measurement?
Yes. BMI looks at your total weight, while your waist shows where some of it sits. ABS data from 2022 shows more Australian adults had a higher-risk waist than a BMI above the healthy range. That’s why it helps to check both.
Does the healthy weight range apply to teenagers?
No. BMI is less accurate for anyone under 18, so the adult range of 18.5 to 24.9 doesn’t apply. Healthdirect has a separate healthy weight calculator for children and teenagers. It compares them with the healthy range for their age and sex. For questions about a child’s growth, talk with your GP.
Why would a practitioner ask about my sleep and stress?
Both shape weight. Healthdirect lists short sleep, shift work and stress among the things that affect it. Asking about them helps your practitioner see what’s making things harder for you. It also stops the conversation from shrinking down to food alone.
What should I bring to a weight consultation?
Bring a recent weight and waist measurement if you have them. A rough idea of your sleep and work hours helps. So does a list of anything else on your mind, from energy to recovery. For more on the format, see what to expect at a telehealth consult.
Where to go from here
The healthy weight range is one number among several. Your waist, your sleep, your routine and your history all add to it. If you’d like to talk it through, read about weight management consultations or how a consultation works. You can also browse our FAQs. When you’re ready, book a consultation and start with a short assessment.
