Live Better
 
 

How to Calculate your BMI

Use our BMI calculator to get a snapshot of how healthy your weight is in relation to your height.

BMI is calculated by dividing your weight(kg) by your height(m) and then dividing the answer by your height(m) again. Use our calculator below to calculate your BMI.

Two adults who are exactly the same height are unlikely to weigh the same amount. This is because body weight depends on factors such as bone structure (small, medium or larger frame), and the proportion of body fat compared to denser muscle.

Body Mass Index (BMI) assesses your weight in relation to your height and can be a useful indicator of whether your weight is above, below or within a healthy range.


BMI Calculator for Australia

What do the results mean?

BMI Chart Australia

BMI Range Category
Below 18.5 Underweight
18.5 – 24.9 Healthy weight
25.0 – 29.9 Overweight
30.0 and above Obese

Source: The World Health Organization


If your BMI falls between 18.5 and 24.9, it indicates you are within the healthy weight range. If your BMI is greater than 25, then you fall into the overweight category. As weight increases above a healthy range, the increased body fat levels are associated with a higher risk of developing health problems such as high blood pressure, high LDL cholesterol levels, type 2 diabetes, coronary heart disease, stroke and some cancers. A BMI below 18.5 is classified as underweight and if the low body weight is a result of restricted food intake, an inadequate nutrient intake is probable.

Is it always accurate? It’s important to understand that BMI is only a guide for healthy weight ranges and health risk in adults – it doesn’t always tell the whole story. People who have higher proportions of muscle, such as athletes and body builders, may be incorrectly classified as overweight. Similarly, people with small frames and lower amounts of muscle mass, including the elderly and some ethnic groups, may be classified as being a healthy weight, despite carrying excess weight for their body type. BMI can be a much better indicator of health status when paired with the Waist Hip Ratio, which considers where the body fat is distributed.

References & More Information

World Health Organisation BMI Classification
Dietitians Association of Australia
Center for Disease Control and Prevention

Latest Articles

Wellbeing

Thrush: signs to look out for

75% of women will experience thrush at least once in their.

Read more
Wellbeing

How to stay smoke-free in summer

Dr Sarah White shares some tips for summer parties.

Read more
Wellbeing

Do you know these beach safety essentials?

Bondi Rescue's Trent Maxwell shares his top tips.

Read more
Wellbeing

Succeeding at work as an introvert

You don’t need to ‘fake it ‘til you make it’.

Read more
Wellbeing

Answers to the questions you can’t ask your boss

An HR expert takes on all your office faux-pas.

Read more
youtubeui-checkbox-tickui-checkbox-emptyui-checkbox-crosstwitterui-checkbox-tickWellbeing and mindfulness 1Physical Health 1Positive psychology 101 1Wellbeing and mindfulness 4All about gut health 1Understanding Genetics 4Planning for Pregnancy 2During Pregnancy 3The mind-gut connection 4The mind-gut connection 1New Parents 3Page 1Group 10During Pregnancy 2Page 1Physical Health 2Planning for Pregnancy 1Positive psychology 101 1Positive psychology 101 4Planning for Pregnancy 4Understanding Genetics 1Physical Health 4Planning for Pregnancy 3Nutrition 4New Parents 1New Parents 3 CopyMovement for your mind 4Wellbeing and mindfulness 2Nutrition 2sob-icon__mind-bodysob-icon__man-with-laptopAll about gut health 2Positive psychology 101 3Positive psychology 101 2Physical Health 3Wellbeing and mindfulness 3All about gut health 3genetics-changing-what-your-givenUnderstanding Genetics 2During Pregnancy 1Movement for your mind 2Movement for your mind 1Movement for your mind 3During Pregnancy 4