Terms of Use

Agreement to terms

By accessing or using Lean Mass Calculator (the "Site"), you agree to be bound by these Terms of Use and our Privacy Policy. If you do not agree with any part of these terms, please do not use the Site.

These terms apply to all visitors, users, and others who access or use the Site. The Site is operated by HealthTools Media Ltd. ("we," "us," or "our"), a company registered in England and Wales.

Nature of the service

Lean Mass Calculator provides free, browser-based calculators and educational content related to body composition, including lean body mass, fat mass, protein targets, and related health metrics. All tools are provided for general informational and educational purposes only.

The calculators on this Site implement published, peer-reviewed formulas (including Boer 1984, James 1976, and Hume 1966). Results are mathematical estimates derived from the values you enter and are subject to the inherent limitations of each formula and your input data.

We make reasonable efforts to ensure the accuracy of our implementations, but we do not guarantee that results are free from error. Independent verification is encouraged.

No medical or professional advice

Nothing on this Site constitutes medical, nutritional, dietary, fitness, or any other form of professional advice, diagnosis, or treatment. Results provided by the calculators are estimates only.

Lean mass formulas were derived from and validated on specific research populations. They may be less accurate for certain individuals, including those with obesity, children, pregnant women, people with certain medical conditions, competitive athletes, and elderly individuals.

Always consult a qualified physician, registered dietitian, or other appropriate healthcare professional before making decisions about your diet, exercise programme, protein intake, or any other health-related matter. Do not delay seeking professional advice because of information or results obtained from this Site.

Limitation of liability

To the maximum extent permitted by applicable law, Lean Mass Calculator, HealthTools Media Ltd., its directors, employees, and contributors shall not be liable for any direct, indirect, incidental, consequential, special, or exemplary damages arising from your use of, or reliance on, the Site or its content, including but not limited to: inaccurate calculator results, decisions made based on those results, or any health outcomes.

You use the Site and its results entirely at your own risk. If you are dissatisfied with any part of the Site or these terms, your sole remedy is to discontinue use of the Site.

Accuracy & corrections

We strive to ensure that formulas are implemented correctly and that cited references are accurate. If you believe you have found an error in a calculation or an incorrect citation, please contact us at hello@leanmasscalculator.com with supporting documentation and we will investigate promptly.

We do not warrant that the Site is error-free or that it will be available without interruption. Content may be updated, corrected, or removed at any time without notice.

Intellectual property

The text, design, code, and other original content of this Site are owned by HealthTools Media Ltd. and are protected by copyright. The underlying mathematical formulas are not copyrightable and are in the public domain.

You may share individual calculator results for personal, educational, or non-commercial purposes provided you attribute the source. You may not reproduce, republish, or redistribute substantial portions of the Site's text content without written permission.

User conduct

You agree not to: use the Site in any way that is unlawful or fraudulent; scrape or systematically download the Site's content without written permission; attempt to interfere with the Site's normal operation; or use the Site to distribute spam, malware, or harmful content.

Third-party links & advertising

The Site may contain links to third-party websites, research papers, or resources. These links are provided for convenience only. We have no control over, and assume no responsibility for, the content, privacy policies, or practices of any third-party sites.

The Site displays advertising through Google AdSense. Advertisers are responsible for the accuracy of their advertisements. We do not endorse or make any representations about advertisers or their products.

Governing law & jurisdiction

These Terms of Use are governed by and construed in accordance with the laws of England and Wales. Any disputes arising under these terms shall be subject to the exclusive jurisdiction of the courts of England and Wales.

If any provision of these terms is found to be invalid or unenforceable by a court, the remaining provisions will continue in full force and effect.

Changes to these terms

We may update these terms at any time. Changes will be effective immediately upon posting to the Site. The 'Last updated' date at the top of this page reflects when the terms were last revised.

Continued use of the Site after any changes constitutes your acceptance of the revised terms. If you object to any change, please discontinue use of the Site.

Contact

Questions about these terms can be sent to hello@leanmasscalculator.com or through our contact page.

HealthTools Media Ltd., 27 Old Gloucester Street, London WC1N 3AX, United Kingdom.