Terms of Service

Last Updated: January 2026

These Terms of Service ("Terms") govern your access to and use of bodyfatpercentagecalc.com (the "Service"), operated by Body Fat Percentage Calculator ("we," "us," or "our"). By accessing or using the Service, you agree to be bound by these Terms. If you do not agree, please do not use the Service. For questions about these Terms, visit our Contact page.

1. Acceptance of Terms

By accessing, browsing, or using any part of this website, you acknowledge that you have read, understood, and agree to be bound by these Terms of Service and our Privacy Policy. These Terms apply to all visitors, users, and anyone who accesses the Service. If you are using the Service on behalf of an organization, you represent that you have the authority to bind that organization to these Terms. We reserve the right to refuse service to anyone for any reason at any time.

2. Service Description

The Service provides free, browser-based body composition estimation tools, including a body fat percentage calculator using the U.S. Navy circumference method, a U.S. Army body composition standards test, a Fat-Free Mass Index (FFMI) calculator, and a body fat percentage reference chart. The Service also includes educational blog content, guides, and informational pages such as our About page. All calculator computations run entirely in your web browser. No personal data, measurements, or results are sent to or stored on our servers. We provide these tools and content free of charge with no account registration required.

3. Medical Disclaimer

The Service is not a medical device and does not provide medical advice, diagnosis, or treatment. The body fat estimates, body composition assessments, FFMI values, and category classifications generated by our calculators are for informational and educational purposes only. They are not a substitute for professional medical advice, clinical body composition analysis, or any form of healthcare. You should not rely on the results of this calculator to make decisions about your diet, exercise program, medical treatment, or any aspect of your health without consulting a qualified healthcare provider. If you have concerns about your body composition, weight, or overall health, seek the advice of a physician or other qualified health professional.

4. Accuracy Disclaimer

While our calculator implements peer-reviewed, validated formulas developed by the U.S. Navy and used by the U.S. military, all circumference-based body fat estimates have inherent limitations. The Navy method typically estimates body fat within 3-4 percentage points of laboratory methods for most individuals, but individual accuracy can vary. Results depend heavily on correct measurement technique, and may be less accurate for individuals with unusual body proportions, very high muscle mass, very low or very high body fat, adolescents, elderly individuals, or those with certain medical conditions. We make no warranties or guarantees regarding the accuracy, completeness, or reliability of any results produced by the calculator.

5. User Responsibilities

You are responsible for providing accurate measurements when using the calculator and for interpreting the results appropriately. You agree to use the Service only for lawful purposes and in accordance with these Terms. You agree not to: use the Service in any way that could damage, disable, overburden, or impair it; attempt to gain unauthorized access to any part of the Service; use automated scripts, bots, or scrapers to access the Service in a manner that degrades performance for other users; reproduce, duplicate, or resell any part of the Service without express written permission; or misrepresent calculator results as clinical or medical assessments.

6. Intellectual Property

All content on this website, including but not limited to text, graphics, logos, icons, images, code, design, and layout, is the property of Body Fat Percentage Calculator or its content creators and is protected by applicable copyright and intellectual property laws. The underlying body fat estimation formulas are published scientific methods and are not proprietary. However, our specific implementation, interface design, educational content, and guides are original works. You may link to our website freely. You may not copy, modify, distribute, sell, or lease any part of our Service or its content without prior written consent. For licensing inquiries, please contact us.

7. Limitation of Liability

To the fullest extent permitted by law, Body Fat Percentage Calculator, its owners, operators, and contributors shall not be liable for any direct, indirect, incidental, special, consequential, or punitive damages arising from your use of or inability to use the Service. This includes, without limitation, damages for errors or inaccuracies in calculator results, reliance on information provided by the Service, loss of data, personal injury, or any other matter relating to the Service. The Service is provided on an "as is" and "as available" basis without warranties of any kind, either express or implied, including but not limited to implied warranties of merchantability, fitness for a particular purpose, or non-infringement. You use the Service entirely at your own risk.

8. Modifications to the Service and Terms

We reserve the right to modify, suspend, or discontinue any aspect of the Service at any time without notice. We may add new features, change existing functionality, or remove tools or content at our sole discretion. We also reserve the right to update these Terms of Service at any time. When we make changes, we will update the "Last Updated" date at the top of this page. Your continued use of the Service after any modifications to these Terms constitutes your acceptance of the revised Terms. It is your responsibility to review these Terms periodically. If you do not agree with modified Terms, your sole remedy is to discontinue use of the Service.

9. Governing Law

These Terms shall be governed by and construed in accordance with applicable laws, without regard to conflict of law principles. Any disputes arising from or relating to these Terms or your use of the Service shall be resolved through good-faith negotiation first. If a dispute cannot be resolved through negotiation, it shall be submitted to the appropriate courts of competent jurisdiction. If any provision of these Terms is found to be invalid or unenforceable, the remaining provisions shall continue in full force and effect. Our failure to enforce any right or provision of these Terms shall not constitute a waiver of that right or provision.

10. Contact

If you have any questions or concerns about these Terms of Service, please reach out to us through our Contact page or email us directly at info@bodyfatpercentagecalc.com. You can learn more about who we are and how our calculator works on our About page. For information about how we handle your privacy, please review our Privacy Policy.