How the calculation works
BMI is weight in kilograms divided by height in metres squared. This calculator uses adult reference groups and keeps the numbers in this browser page.
Inputs and results are not sent to EmpowerLink or analytics.
BMI Calculator
Calculate your adult Body Mass Index (BMI). This is a general guide, not a diagnosis or a complete picture of your health.
BMI Categories
| BMI Range | Category |
|---|---|
| < 18.5 | Underweight |
| 18.5 - 24.9 | Normal weight |
| 25 - 29.9 | Overweight |
| ≥ 30 | Obesity |
BMI = kg/m² where kg is weight in kilograms and m² is height in metres squared.
What is BMI?
Body Mass Index (BMI) is a simple calculation using a person's height and weight. It compares weight with height but cannot distinguish muscle from body fat. A health professional can interpret it alongside other information about your health.
The Role of Healthy Eating
- Variety: Include fruits, vegetables, whole grains, lean proteins, and healthy fats in your diet.
- Portion Control: Be mindful of portion sizes to avoid overeating.
- Limit Unhealthy Foods: Reduce the intake of processed foods, sugary drinks, and high-fat, high-sugar snacks.
BMI Limitations
BMI is not the most reliable measure of whether your weight is in a healthy range. It doesn't take into account important factors like age, gender, and body composition (fat, muscle, and bone).
BMI may not be accurate for:
- Some ethnic groups including Aboriginal and/or Torres Strait Islander Peoples, and people of Asian/South Asian descent
- Women who are pregnant
- People 19 years of age or younger
- Athletes or people with a lot of muscle
- People with conditions affecting fluid levels (e.g., heart failure)
Need Professional Guidance?
At EmpowerLink, our team of registered nurses can provide professional recommendations tailored to your individual health needs. We can also assist with referrals to dietitians who specialise in creating personalised nutrition plans.
Speak with your GP or treating team about what the result means for you. Do not use a BMI result alone to decide on treatment or changes to eating.
Contact UsUse BMI with context
BMI cannot distinguish muscle from body fat or show where fat is distributed. It should not be used alone to make treatment or eating decisions.