Terms of Service

1. Acceptance of Terms

Welcome to Sleep Calculator ("we," "us," "our," or the "Website"). These Terms of Service ("Terms") govern your access to and use of our website located at calculatemysleep.org, including all content, features, tools, and services offered on the Website.

By accessing or using our Website, you agree to be bound by these Terms and our Privacy Policy. If you do not agree to these Terms, please do not use our Website.

We reserve the right to modify these Terms at any time. Changes will be effective immediately upon posting to the Website. Your continued use of the Website after changes are posted constitutes your acceptance of the modified Terms. We encourage you to review these Terms periodically.

2. Description of Service

Sleep Calculator provides free, web-based tools designed to help you optimize your sleep schedule based on the science of sleep cycles. Our services include:

• Bedtime Calculator: Calculates optimal bedtimes based on your desired wake time and 90-minute sleep cycle intervals.
• Wake-Up Calculator: Determines the best times to set your alarm based on when you go to bed.
• Sleep Cycle Calculator: Analyzes your sleep patterns and shows how many complete sleep cycles you can achieve.
• Sleep Debt Calculator: Estimates accumulated sleep debt and recovery recommendations.
• Sleep by Age Calculator: Provides age-appropriate sleep duration recommendations based on established guidelines.
• Educational Content: Blog articles, guides, and resources about sleep science, sleep hygiene, and healthy sleep habits.

All calculations are performed locally in your web browser. We do not require account registration, and we do not store your sleep data on our servers.

3. Important Medical Disclaimer

Understanding the Limitations

Our sleep calculators are based on the widely-accepted scientific model that sleep cycles average approximately 90 minutes. However, it is important to understand the following limitations:

• Individual variation: Sleep cycles can range from 70 to 120 minutes depending on the individual, age, health conditions, and other factors.
• Approximations: The 15-minute "time to fall asleep" estimate is an average and may not reflect your personal sleep onset latency.
• Not diagnostic: Our calculators cannot diagnose sleep disorders, health conditions, or individual sleep needs.
• General guidelines: Results should be used as starting points for experimentation, not absolute prescriptions.

When to Seek Professional Help

You should consult a qualified healthcare provider or sleep specialist if you experience:

• Chronic difficulty falling asleep or staying asleep
• Persistent daytime fatigue despite adequate sleep time
• Loud snoring, gasping, or breathing interruptions during sleep
• Excessive daytime sleepiness that interferes with daily activities
• Unusual sleep behaviors (sleepwalking, sleep talking, night terrors)
• Symptoms of sleep disorders such as insomnia, sleep apnea, restless leg syndrome, or narcolepsy
• Any sleep problems that persist despite lifestyle changes

Never delay seeking professional medical advice because of information obtained from this Website.

4. Use of the Website

Permitted Use

You may use our Website for personal, non-commercial purposes in accordance with these Terms. This includes:

• Using our calculators to estimate optimal sleep times
• Reading and learning from our educational content
• Sharing links to our content with others
• Printing content for personal reference

Prohibited Use

You agree NOT to:

• Use the Website for any unlawful purpose or in violation of any applicable laws or regulations
• Attempt to gain unauthorized access to any portion of the Website, other accounts, or computer systems
• Use automated systems, bots, or scripts to access the Website in a manner that sends more requests than a human could reasonably produce
• Interfere with or disrupt the Website's infrastructure, servers, or networks
• Copy, reproduce, distribute, or create derivative works from our content without permission
• Remove, alter, or obscure any copyright, trademark, or proprietary notices
• Use the Website to transmit malware, viruses, or other harmful code
• Impersonate any person or entity or misrepresent your affiliation with any person or entity
• Collect or harvest any information from the Website for commercial purposes
• Use our content to create competing products or services

5. Intellectual Property Rights

Our Content

The Website and its entire contents, features, and functionality (including but not limited to all text, graphics, logos, icons, images, audio clips, digital downloads, data compilations, and software) are owned by Sleep Calculator, its licensors, or other providers and are protected by United States and international copyright, trademark, patent, trade secret, and other intellectual property or proprietary rights laws.

Limited License

We grant you a limited, non-exclusive, non-transferable, revocable license to access and use the Website for personal, non-commercial purposes. This license does not include:

• Any resale or commercial use of the Website or its contents
• Any collection and use of product listings, descriptions, or prices
• Any derivative use of the Website or its contents
• Any downloading or copying of information for the benefit of another merchant
• Any use of data mining, robots, or similar data gathering and extraction tools

Trademarks

The Sleep Calculator name, logo, and all related names, logos, product and service names, designs, and slogans are trademarks of Sleep Calculator or its affiliates. You may not use such marks without our prior written permission.

6. Third-Party Links and Content

Our Website may contain links to third-party websites, resources, or services that are not owned or controlled by us. These links are provided for your convenience and informational purposes only.

We have no control over, and assume no responsibility for, the content, privacy policies, or practices of any third-party websites or services. You acknowledge and agree that we shall not be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with the use of or reliance on any such content, goods, or services available on or through any such websites or services.

We strongly advise you to read the terms of service and privacy policies of any third-party websites you visit.

7. Disclaimer of Warranties

THE WEBSITE AND ALL CONTENT, TOOLS, AND SERVICES ARE PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS, WITHOUT ANY WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED.

TO THE FULLEST EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO:

• IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT
• WARRANTIES THAT THE WEBSITE WILL BE UNINTERRUPTED, TIMELY, SECURE, OR ERROR-FREE
• WARRANTIES THAT THE RESULTS OBTAINED FROM USE OF THE WEBSITE WILL BE ACCURATE OR RELIABLE
• WARRANTIES THAT ANY ERRORS IN THE WEBSITE WILL BE CORRECTED
• WARRANTIES REGARDING THE ACCURACY, RELIABILITY, OR COMPLETENESS OF ANY CONTENT

You understand and agree that you use the Website at your own risk. Any content downloaded or otherwise obtained through the Website is accessed at your own discretion and risk.

8. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL SLEEP CALCULATOR, ITS AFFILIATES, OFFICERS, DIRECTORS, EMPLOYEES, AGENTS, OR LICENSORS BE LIABLE FOR ANY:

• INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES
• LOSS OF PROFITS, REVENUE, DATA, OR USE
• DAMAGES ARISING FROM YOUR USE OF OR INABILITY TO USE THE WEBSITE
• DAMAGES ARISING FROM ANY CONTENT OBTAINED FROM THE WEBSITE
• DAMAGES ARISING FROM UNAUTHORIZED ACCESS TO OR ALTERATION OF YOUR TRANSMISSIONS OR DATA
• PERSONAL INJURY OR PROPERTY DAMAGE RELATED TO YOUR USE OF THE WEBSITE

THIS LIMITATION APPLIES WHETHER THE ALLEGED LIABILITY IS BASED ON CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY, OR ANY OTHER BASIS, EVEN IF WE HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. IN SUCH JURISDICTIONS, OUR LIABILITY IS LIMITED TO THE GREATEST EXTENT PERMITTED BY LAW.

9. Indemnification

You agree to defend, indemnify, and hold harmless Sleep Calculator, its affiliates, licensors, and service providers, and its and their respective officers, directors, employees, contractors, agents, licensors, suppliers, successors, and assigns from and against any claims, liabilities, damages, judgments, awards, losses, costs, expenses, or fees (including reasonable attorneys' fees) arising out of or relating to:

• Your violation of these Terms
• Your use of the Website, including but not limited to your use of any content, services, or products other than as expressly authorized in these Terms
• Your violation of any third-party rights, including intellectual property rights
• Any claim that your use of the Website caused damage to a third party

10. Governing Law and Jurisdiction

These Terms and any dispute or claim arising out of or in connection with them or their subject matter or formation (including non-contractual disputes or claims) shall be governed by and construed in accordance with the laws of the United States, without regard to its conflict of law provisions.

Any legal suit, action, or proceeding arising out of or related to these Terms or the Website shall be instituted exclusively in the federal courts of the United States or the courts of the state in which we are located. You waive any and all objections to the exercise of jurisdiction over you by such courts and to venue in such courts.

11. Dispute Resolution

In the event of any controversy or claim arising out of or relating to these Terms, the parties shall first attempt to resolve the dispute through good faith negotiation. If the dispute cannot be resolved through negotiation within thirty (30) days, either party may pursue resolution through the appropriate legal channels.

You agree that any dispute resolution proceedings will be conducted only on an individual basis and not in a class, consolidated, or representative action.

12. Modifications to the Website

We reserve the right to modify, suspend, or discontinue, temporarily or permanently, the Website or any service to which it connects, with or without notice and without liability to you. This includes:

• Adding, removing, or modifying calculators and their features
• Changing the design, layout, or user interface
• Updating or changing educational content
• Implementing new features or removing existing ones
• Modifying technical infrastructure or hosting arrangements

We shall not be liable to you or any third party for any modification, suspension, or discontinuance of the Website.

13. Severability

If any provision of these Terms is held by a court or other tribunal of competent jurisdiction to be invalid, illegal, or unenforceable for any reason, such provision shall be eliminated or limited to the minimum extent such that the remaining provisions of the Terms will continue in full force and effect.

14. Waiver

No waiver by us of any term or condition set forth in these Terms shall be deemed a further or continuing waiver of such term or condition or a waiver of any other term or condition. Any failure by us to assert a right or provision under these Terms shall not constitute a waiver of such right or provision.

15. Entire Agreement

These Terms, together with our Privacy Policy and any other legal notices or policies published by us on the Website, constitute the entire agreement between you and Sleep Calculator regarding your use of the Website and supersede all prior and contemporaneous understandings, agreements, representations, and warranties, both written and oral, regarding the Website.

16. Contact Information

If you have any questions about these Terms of Service, please contact us:

We will respond to your inquiry within a reasonable timeframe.