Health
BMI Calculator
Check your body mass index and healthy weight range.
What it means
About body mass index
BMI is a simple screening number that compares your weight to your height. It is calculated as weight in kilograms divided by height in metres squared. It gives a quick, general indication of whether your weight is in a healthy range for your height, and is widely used because it needs only two easy measurements.
BMI is a guide, not a diagnosis. It does not account for muscle mass, body composition, age, or where fat is carried, so very muscular people can read as "overweight" while the number may understate risk for others. Treat it as a starting point and speak to a doctor for personal advice.
Questions
Is BMI accurate for everyone?
No. It is a general screening tool and does not measure body fat directly. Athletes, older adults, and pregnant people may get misleading results.
What is a healthy BMI?
For most adults, a BMI between 18.5 and 24.9 is considered healthy. This tool shows the healthy weight range for your height.
How can I lower my BMI safely?
Gradual changes to diet and activity are safest. For a personal plan, talk to a doctor or a registered dietitian rather than relying on BMI alone.