BMI Calculator
Estimate your Body Mass Index (BMI) from your weight and height. This adult BMI tool provides a general screening estimate, not a medical diagnosis.
Your result will appear here.
What is BMI?
Body Mass Index is a screening measure calculated from weight and height. It can help provide a broad starting point, but it does not directly measure body fat or overall health.
Adult BMI reference ranges
- Below 18.5: underweight range
- 18.5 to 24.9: healthy weight range
- 25.0 to 29.9: overweight range
- 30.0 and above: obesity range
These categories are commonly used for adults and may not apply to children, teenagers, pregnant people or all ethnic groups. Muscle mass, age and other health factors matter.
Frequently asked questions
Is BMI a diagnosis? No. BMI is a screening measure and should be interpreted with other health information by a qualified healthcare professional.
What units does this tool use? Enter weight in kilograms and height in centimetres.
Health disclaimer: This calculator is for general educational information only. It is not a substitute for professional medical advice, diagnosis or treatment.