Medical & Affiliate Disclosure

Medical Disclaimer

BMITool.org provides educational information only and is not a substitute for professional medical advice, diagnosis, or treatment.

The calculators, articles, and resources on this site are for general informational purposes. They should not be used as a replacement for consultation with a qualified healthcare provider, including physicians, registered dietitians, or certified fitness professionals.

Always seek the advice of your healthcare provider with any questions you may have regarding your weight, metabolic health, or fitness. Never disregard professional medical advice or delay seeking it because of something you have read on this website.

BMI is a screening tool, not a diagnostic of body fatness or health. Muscle mass, bone density, body composition, and fat distribution are not captured by BMI calculations. Individual health assessment requires clinical examination and comprehensive evaluation.

Children and adolescents require age and sex-specific BMI percentile evaluation, not adult BMI categories. Asian populations may require ethnicity-specific BMI thresholds for accurate metabolic risk assessment.

About the Author

This site is authored by Dr. David Chen, a board-certified Internal Medicine physician with additional training in metabolic health and obesity medicine.

Dr. Chen holds an MD from Johns Hopkins University and an MPH from Harvard T.H. Chan School of Public Health. He has 15+ years of clinical practice experience and previously served as a researcher at the NIH National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).

While Dr. Chen is a licensed healthcare professional, use of this website does not create a patient-provider relationship between you and Dr. Chen or BMITool.org. Communication through this website does not constitute medical consultation.

Affiliate Disclosure

BMITool.org is a free resource supported by advertising and affiliate partnerships. We may earn a commission when you click on links to products or services from our affiliate partners.

This does not affect the price you pay for any products or services. Our editorial content is independent of our affiliate relationships, and we only recommend products or services that we believe will be genuinely helpful to our readers.

We are committed to transparency and will always disclose affiliate relationships when relevant. If you have any questions about our affiliate partnerships, please contact us at contact@bmitool.org.

Privacy & Data

All calculations on BMITool.org happen entirely in your web browser. Your health data — including height, weight, age, and BMI calculations — is never sent to our servers, never stored in a database, and never shared with third parties.

We use local storage only to optionally remember your calculator inputs if you choose to enable the "Save my inputs" feature. This data stays on your device and can be cleared at any time through your browser settings.