Body mass index (BMI)
Body Mass Index
The body mass index (BMI) is used as a screening tool to indicate whether a person is underweight, overweight, obese or healthy. It uses your height and weight to assess where you stand.
If a person's BMI is out of the healthy BMI range, their health risks may increase significantly.
Underweight (BMI less than 18.5)
Healthy Weight (BMI 18.5 to 24.9)
Overweight (BMI 25 to 30)
Obese (BMI 30 +)
Your suggested healthy weight range 53 117 - 72159kgLbs
You are underweight for your height. It's important to aim to keep within your healthy weight range. Being in the healthy weight range will improve your body's ability to fight off infection or illness.
Talk to your GP
If you're concerned about your weight or you are losing weight without trying, talk to your doctor or an Accredited Practising Dietitian.
You are a healthy weight for your height. But we recommend that you also check your waist measurement.
Aim to keep within the healthy weight range by enjoying a healthy, well-balanced diet and exercising regularly. Most adults should get at least 30 minutes of moderate-intensity physical activity on most, if not all, days.
For older Australians, your general health may be more important than being mildly overweight. Some researchers have suggested that a BMI range of 22-26 is acceptable for older Australians over 70 years old.
You are in the overweight category.
It is recommended that you check your waist hip ratio too.
Being overweight suggests that you need to make small changes to your eating and activity pattern to prevent the risk of other health conditions.
Even losing 5% of your weight will reduce your health risks significantly.
Beware of fad diets as you will yo-yo back once you stop!
Scroll over yoyo – explanation on my website
You are in the obese category.
As your BMI increases, so does your risk to developing coronary heart disease and other health conditions. It is vital that you take steps to reduce your weight and consequently improve your eating habits.
Benefits of maintaining healthy weight
• Fewer joint and muscle pains
• Increased energy and ability to join in more activities
• Improved regulation of body fluids and blood pressure
• Reduced burden on the heart and circulatory system
• Improved sleep patterns
• Reduction in blood triglycerides, blood glucose, and risk of developing type 2 diabetes
• Reduced risk for heart disease and certain cancers.
BMI compares your weight to your height, and is calculated by dividing your weight (in kilograms) by your height (in metres squared). It gives you an idea of whether you’re 'underweight', a 'healthy' weight, 'overweight', or 'obese' for your height. BMI is one type of tool to help health professionals assess the risk for chronic disease. Another important tool is waist circumference. It is also important to understand your other risk factors.
Waist circumference is a simple check to tell if you are carrying excess body fat around your middle.
Where your fat is on your body can be an important sign of your risk of developing ongoing health problems. Carrying excess body fat around your middle is more of a health risk than if weight is on your hips and thighs.
Did you know?
The Quetelet Index was devised by Adolphe Quetelet, a Belgian mathematician, astronomer and statistician, in 1832. It was later termed "body mass index" in 1972 by Ancel Keys.
One must keep in mind that factors such fat percentage and muscle mass are not accounted for in BMI. But a higher BMI is a fairly good indicator of a higher fat percentage.
BMI values are age-independent and the same for both sexes.