Terms and Conditions of Service

1. Acceptance of Terms

By browsing, using, or interacting with HOW WEIGHT (“the Website”, “we”, “us”, or “our”), you agree to be bound by these Terms and Conditions (“Terms”), our Privacy Policy, and our Medical Disclaimer. If you do not agree with any part of these Terms, you must cease using the platform immediately.

2. Medical & Health Non-Diagnostic Disclaimer

The tools on this platform—including but not limited to the BMI Calculator, Ideal Weight Calculator, Calorie & BMR Calculator, TDEE Calculator, Body Fat Calculator, and Weight Difference Visualizer—use generalized population-level equations.

• No Doctor-Patient Relationship: Use of this site does not establish a physician-patient relationship or clinical consultation.
• Physician Clearance: You must consult a qualified physician or registered dietitian before initiating any caloric restriction, weight-gain protocol, exercise routine, or dietary overhaul.
• Medical Emergencies: If you are experiencing a medical emergency, acute chest pain, severe weakness, or a critical mental health crisis, call your local emergency services (e.g. 911 in the USA, 999 in the UK, 112 in the EU) immediately.

3. Permitted & Prohibited Conduct

You are granted a personal, non-exclusive, non-transferable, revocable license to access and use HOW WEIGHT for personal, non-commercial purposes. When using the site, you agree NOT to:

• Use any automated robot, spider, scraper, or data harvesting tool to extract formulas, tables, or text in bulk without written authorization.
• Attempt to interfere with or compromise the security, integrity, or proper functioning of the site's infrastructure.
• Misrepresent calculation results as formal clinical diagnostic reports or medical certifications.
• Use the website in any manner that violates local, state, national, or international law.

4. Intellectual Property Rights

All original text, interactive UI design, CSS stylesheets, graphic indicators, visual meters, code structure, and logos on HOW WEIGHT are the proprietary intellectual property of HOW WEIGHT and are protected by applicable copyright, trademark, and trade dress laws.

*Historical public scientific formulas (such as Devine 1974, Mifflin-St Jeor 1990, and WHO BMI cutoffs) remain in the public domain and are cited accordingly.

5. Disclaimer of Warranties (“As-Is”)

HOW WEIGHT and its contents are provided on an “AS IS” and “AS AVAILABLE” basis without warranties of any kind, whether express or implied.

While we strive for rigorous calculation accuracy and maintain unit test coverage, we do not warrant that the website will be uninterrupted, error-free, completely bug-free, or that results will achieve specific physical outcomes for any individual.

6. Limitation of Liability

To the maximum extent permitted by applicable law, in no event shall HOW WEIGHT, its operators, contributors, or authors be liable for any direct, indirect, incidental, consequential, special, or exemplary damages—including but not limited to injuries, dietary complications, metabolic disturbances, loss of data, or loss of profits—arising out of or in connection with your use or inability to use this platform.

7. Third-Party Links & Advertising

Our website may contain hyperlinks to external resources, public health agencies (e.g., WHO, CDC, PubMed), and third-party advertising partners. We do not endorse, oversee, or assume responsibility for the content, privacy policies, or practices of any external third-party websites.

8. Modifications to Terms

We reserve the right to revise or replace these Terms and Conditions at our sole discretion at any time. Continued use of the website following any posted modifications constitutes constructive acceptance of the revised Terms.