Calculate your Body Mass Index (BMI) to get a quick assessment of your body weight relative to your height.
Body Mass Index (BMI) is a simple ratio of weight to height used as a screening tool to categorize individuals as underweight, normal weight, overweight, or obese. It is calculated by dividing your weight in kilograms by the square of your height in meters.
Underweight: below 18.5. Normal weight: 18.5 to 24.9. Overweight: 25 to 29.9. Obese: 30 and above. These ranges are based on statistical associations with health outcomes in large population studies.
BMI does not distinguish between fat mass and muscle mass. An athletic person with significant muscle may have a high BMI while being perfectly healthy. BMI also does not account for fat distribution: where you carry weight matters for health risk. Use BMI as one data point among many, not as a definitive health measure.
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