Terms & Conditions

1 Acceptance of Terms

By accessing or using the Free Metabolic Age Calculator website ("Site"), operated by BigTechies, you agree to be bound by these Terms & Conditions and our Privacy Policy. If you do not agree, please do not use the Site.

We reserve the right to update these Terms at any time. Continued use of the Site after changes are posted constitutes acceptance of the revised Terms.

2 Description of Service

The Site provides a free online tool that estimates:

• Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation.
• Metabolic Age by comparing your BMR to age-group population averages.
• Total Daily Energy Expenditure (TDEE) based on user-selected activity levels.

The service is provided free of charge and is funded through display advertising. We reserve the right to modify, suspend, or discontinue any part of the service at any time without prior notice.

3 Medical Disclaimer

• Calculator results are estimates based on statistical formulas, not clinical measurements.
• Results are not a medical diagnosis and should not be treated as one.
• Always consult a qualified healthcare provider, physician, or registered dietitian before making significant changes to your diet, calorie intake, or exercise regimen.
• If you have a medical condition (e.g. thyroid disorders, metabolic disease, eating disorders), consult your doctor before interpreting these results.

4 Accuracy & Limitations

We strive to provide accurate, science-backed information. However:

• The Mifflin-St Jeor formula has an estimated accuracy of ±5–8% for healthy adults and may be less accurate for athletes, elderly individuals, or those with certain medical conditions.
• Metabolic age reference tables are derived from population averages and represent statistical estimates, not individual clinical measurements.
• We make no guarantees about the completeness, accuracy, or timeliness of results.
• Results may vary depending on the accuracy of the data you enter.

5 Permitted Use

You may use the Site for personal, non-commercial purposes. You agree not to:

• Scrape, crawl, or systematically download content from the Site without permission.
• Use the Site to distribute spam, malware, or any harmful content.
• Attempt to reverse-engineer, decompile, or interfere with the Site's infrastructure.
• Reproduce or redistribute Site content (including but not limited to articles and reference tables) without attribution and a link back to the original page.
• Use the Site in any way that violates applicable laws or regulations.

6 Intellectual Property

All content on this Site — including text, graphics, code, and design — is owned by or licensed to BigTechies and is protected by applicable copyright and intellectual property laws. The Mifflin-St Jeor formula itself is public domain scientific research (Mifflin MD et al., 1990).

You may not copy, modify, distribute, sell, or create derivative works from our proprietary content without our express written permission.

7 Third-Party Links & Advertising

The Site may display third-party advertisements (via Google AdSense) and links to external websites. We are not responsible for the content, accuracy, or privacy practices of those third parties. Clicking on advertisements or external links is entirely at your own discretion and risk.

The presence of an advertisement does not constitute our endorsement of the advertised product or service.

8 Limitation of Liability

To the fullest extent permitted by law, BigTechies shall not be liable for any direct, indirect, incidental, special, or consequential damages arising from:

• Your use of or inability to use the Site or calculator.
• Any reliance placed on the results, content, or information on the Site.
• Any errors or inaccuracies in the calculator results.
• Unauthorized access to or alteration of your data.
• Any interruption, suspension, or discontinuation of the Site.

If you are dissatisfied with the Site, your only remedy is to stop using it.

9 Disclaimer of Warranties

The Site and its content are 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, and non-infringement.

We do not warrant that the Site will be uninterrupted, error-free, or free of viruses or other harmful components.

10 Governing Law

These Terms are governed by and construed in accordance with applicable law. Any disputes arising from your use of the Site shall be resolved through good-faith negotiation. If a dispute cannot be resolved amicably, it shall be subject to the jurisdiction of competent courts.

11 Changes to These Terms

We reserve the right to modify these Terms at any time. Updated Terms will be posted on this page with a revised date. It is your responsibility to review these Terms periodically. Significant changes will be noted at the top of this page.