Calculate body mass index with instant health assessment and recommendations
Enter your weight and height to get your Body Mass Index and personalized health insights.
Professional health assessment tools for fitness professionals, healthcare providers, and wellness enthusiasts
Industry-standard BMI calculation with precise health category assessment and recommendations
Comprehensive health risk evaluation with personalized recommendations and ideal weight ranges
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Real-time BMI calculation with immediate health insights and actionable recommendations
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Everything you need to know about BMI calculation, health assessment, and wellness planning
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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