BMI Calculator
Calculate your Body Mass Index and understand your weight category
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BMI is a useful screening tool, but it doesn't diagnose body fatness or health. Consider factors like muscle mass, age, and gender when interpreting results.
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Fill in your weight and height to calculate your BMI
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References
- World Health Organization (WHO) - BMI Classification
- National Institutes of Health (NIH) - Clinical Guidelines
- Centers for Disease Control and Prevention (CDC) - Healthy Weight
About BMI Calculator
How It Works
BMI is calculated by dividing your weight in kilograms by your height in meters squared (kg/m2). This measurement estimates body fat and is classified by the World Health Organization into categories: underweight (less than 18.5), normal weight (18.5 to 24.9), overweight (25 to 29.9), and obese (30 or higher).
How to Interpret Results
Your BMI number places you in a weight category that correlates with health risks. A normal BMI is associated with lower risk of chronic diseases. However, BMI is a screening tool, not a diagnostic test. It should be considered alongside other health indicators for a complete assessment.
Health Tips
Maintain a balanced diet and regular exercise to keep your BMI in the healthy range. Even modest weight loss of 5-10% can significantly improve health outcomes if you are overweight. Focus on sustainable lifestyle changes rather than quick fixes.
Limitations
BMI does not distinguish between muscle and fat mass, so athletes may be miscategorized as overweight. It also does not account for fat distribution, age, gender, or ethnicity. Alternative measurements like waist-to-height ratio may provide additional insight.
Last reviewed: July 16, 2026
Medical Disclaimer: This calculator is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or qualified health provider with any questions regarding your health.