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Preguntas comunes sobre
BMI (Body Mass Index) is weight in kilograms divided by height in meters squared. A BMI of 18.5-24.9 is considered normal weight. It's a quick screening tool, not a diagnostic — it doesn't distinguish between muscle and fat mass.
Underweight: below 18.5. Normal: 18.5-24.9. Overweight: 25-29.9. Obese: 30 and above. These ranges were established by the WHO and apply to adults over 20. Children and teens use age-specific BMI percentiles instead.
Use BMI as a starting point, not a verdict. Track it over time alongside other metrics like waist-to-hip ratio and blood pressure. Consult a healthcare provider for personalized advice — BMI alone doesn't determine health status.
BMI doesn't account for muscle mass, bone density, age, sex, or fat distribution. Athletes often have high BMI despite low body fat. Waist circumference and body fat percentage provide additional context for health assessment.
No. Children's BMI is interpreted using age- and sex-specific percentile charts because body composition changes significantly during growth. A child's BMI is compared against others of the same age and sex, not fixed adult ranges.
Yes. Research shows that health risks can differ across ethnic groups at the same BMI. For example, some Asian populations may have higher health risks at lower BMI values. WHO suggests adjusted thresholds for certain populations.
Yes. All calculations run locally in your browser. Your weight, height, and BMI results are never sent to any server or stored anywhere. Close the tab and all data is gone.
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