Last updated: July 12, 2026
Welcome to Si Ranker (siranker.com). By accessing or using this website and its tools, you agree to be bound by these Terms & Conditions. If you do not agree with any part of these terms, please do not use the website.
Si Ranker provides free online calculators and informational articles. All tools and content are provided for general informational and educational purposes only. You may use them for personal, non-commercial purposes. You agree not to:
Our calculators — including the Sleep Calculator — provide estimates based on averages and published general guidelines. They are not medical advice, diagnosis, or treatment, and are not a substitute for consultation with a qualified healthcare professional. Always seek the advice of a doctor with any questions about a medical condition or sleep disorder. Never disregard professional medical advice because of something you read or calculated on this website.
We work to keep our tools and articles accurate and up to date, but we make no warranties of any kind, express or implied, about the completeness, accuracy, or reliability of any information on the site. Any reliance you place on such information is strictly at your own risk.
Unless otherwise stated, Si Ranker owns the intellectual property rights for all original material on siranker.com, including the design, code, and text of our tools and articles. All rights are reserved.
This website displays third-party advertising (including Google AdSense) to keep our tools free. Advertisements do not constitute an endorsement of the advertised products or services, and we are not responsible for the content of third-party ads or the websites they link to.
To the maximum extent permitted by law, Si Ranker and its operators shall not be liable for any direct, indirect, incidental, consequential, or special damages arising out of your use of, or inability to use, this website or its tools.
Our site may link to external websites that are not operated by us. We have no control over, and assume no responsibility for, the content or practices of any third-party sites.
We may revise these Terms & Conditions at any time. Continued use of the website after changes are posted constitutes your acceptance of the revised terms.
Questions about these terms? Reach us at contact@siranker.com or via our Contact page.