Terms of Service

1. Acceptance of terms

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

If you are under 18, you must have your parent or guardian's permission to use this Site. If you are under 13, you may not use this Site.

2. Description of service

Caffeine Math provides free, web-based tools for understanding caffeine content in beverages and foods, estimating daily caffeine intake, calculating caffeine half-life and sleep timing, and browsing reference data about caffeine. The Site also publishes educational content about caffeine, safe limits, withdrawal, and related topics.

The Site is provided free of charge. We do not sell anything, do not run ads, and do not require an account. All tools run entirely in your browser.

3. No medical advice

The Site provides general information only and is not a substitute for professional medical advice, diagnosis, or treatment.

Specifically:

• The caffeine values displayed are typical averages from public databases and manufacturer labels. Actual caffeine content can vary by 20% or more depending on brew method, brand, and serving size.
• The safe-limit calculations reflect general guidance from the FDA, EFSA, ACOG, and AAP. Your individual tolerance may be meaningfully lower based on genetics, medications, and health conditions.
• The half-life calculator uses an average of 5 hours. Your actual half-life may range from 3 to 11 hours based on genetics, smoking, pregnancy, oral contraceptives, and liver function.
• The withdrawal timeline reflects typical patterns; individual symptoms may be milder or more severe.

Always consult a qualified healthcare provider before making decisions about caffeine intake, especially if you:

• Are pregnant, trying to conceive, or breastfeeding
• Have a heart condition, high blood pressure, or arrhythmia
• Have an anxiety disorder, panic disorder, or PTSD
• Have GERD, acid reflux, or stomach ulcers
• Are taking medications that interact with caffeine (including certain antibiotics, antidepressants, and thyroid medications)
• Are under 18 or over 65
• Have liver disease or impaired liver function

See our full medical disclaimer for more details.

4. Acceptable use

You agree not to:

• Use the Site for any illegal purpose or in violation of any local, state, national, or international law
• Attempt to gain unauthorized access to the Site's systems, databases, or hosting infrastructure
• Scrape, mirror, or republish the caffeine database or content without attribution
• Use automated tools (bots, scrapers, scripts) to access the Site at a rate that degrades performance for other users
• Submit malicious code, attempt to exploit vulnerabilities, or interfere with the Site's normal operation

We reserve the right to block access to the Site for any user who violates these terms.

5. Intellectual property

The Site's design, code, and original content (including guides, FAQs, and tool implementations) are owned by Caffeine Calculator and protected by copyright. You may:

• View and use the tools for personal, non-commercial purposes
• Link to any page on the Site
• Quote brief excerpts (under 100 words) of our content with attribution and a link back to the source page

You may not:

• Republish our content in full on another site
• Use our tools or content commercially without written permission
• Remove or alter any copyright, trademark, or attribution notices
• Present our content as your own

The caffeine values themselves are factual data from public sources (USDA, FDA, manufacturer labels) and are not subject to our copyright. You are free to use those values in your own work; we ask only that you cite the original source.

6. Disclaimer of warranties

The Site is provided "as is" and "as available", without warranties of any kind, express or implied. We do not warrant that:

• The Site will be available at all times without interruption
• The caffeine values are 100% accurate or current (we update them quarterly but brands reformulate)
• The calculators will produce medically valid results for your specific situation
• The Site is free of bugs, errors, or security vulnerabilities

To the fullest extent permitted by law, we disclaim all warranties, including implied warranties of merchantability, fitness for a particular purpose, and non-infringement.

7. Limitation of liability

To the fullest extent permitted by law, Caffeine Math shall not be liable for any direct, indirect, incidental, consequential, special, or exemplary damages arising out of or in connection with your use of (or inability to use) the Site, including but not limited to:

• Health consequences of caffeine consumption decisions made based on information from the Site
• Disruption of sleep, work, or other activities
• Adverse reactions from caffeine withdrawal or overdose
• Loss of data, business interruption, or computer malfunction

You are solely responsible for your caffeine-related decisions and their consequences. If you experience severe symptoms of caffeine overdose (rapid heartbeat, chest pain, seizures, difficulty breathing), seek emergency medical attention immediately.

8. Third-party links

The Site contains links to external websites (USDA, FDA, scientific journals, manufacturer pages). We are not responsible for the content, accuracy, or practices of these external sites. Visiting external links is at your own risk.

9. Changes to these terms

We may update these Terms of Service from time to time. When we do, we'll update the "Last updated" date at the top of this page. If we make material changes — for example, if we ever introduce paid features or begin running ads — we'll add a prominent notice on the home page at least 30 days before the change takes effect.

Continued use of the Site after changes take effect constitutes acceptance of the updated terms.

10. Governing law

These Terms shall be governed by and construed in accordance with applicable international laws, without regard to conflict of law provisions. Any disputes arising from these Terms shall be resolved through good-faith communication first. If informal resolution fails, disputes shall be resolved through binding arbitration.

11. Contact

Questions about these Terms? Please contact us. We aim to respond within 7 days.