Terms of Service

Last updated: May 18, 2026

By using FastingTimeCalculator.com, you agree to the terms below. They're written in plain English, not legalese, because these terms should be understandable to everyone who uses the site.

Not Medical Advice

The calculators, blog posts, and other content on FastingTimeCalculator.com are educational resources, not medical advice. Intermittent fasting affects your metabolism, hormones, and energy balance. If you have a medical condition, take prescription medication, are pregnant or breastfeeding, have a history of disordered eating, or are under 18, talk to a qualified healthcare provider before starting a fasting protocol. Nothing on this site is intended to diagnose, treat, cure, or prevent any disease.

Calculator Accuracy

The fasting window calculator uses straightforward 24-hour arithmetic, if you tell it your last meal was at 8:00 PM and your protocol is 16:8, your fast ends at 12:00 PM the next day. That part is precise.

The calorie burn estimate is a different story. It uses a simplified form of the Mifflin-St Jeor equation to estimate your basal metabolic rate and then derives a fasting-period calorie burn from that. This is a population-level approximation, not a measurement of your individual metabolism. Your actual energy expenditure depends on body composition, muscle mass, activity level, sleep, stress, medications, genetics, and other factors the calculator can't see. Treat the calorie figure as a reasonable ballpark, not a precise number to build a diet around.

Your Use of the Site

You're welcome to use our calculators for personal planning, reference them in your own work with attribution, and share links to our pages. You may not:

  • Scrape, mirror, or republish the site's content in bulk
  • Reverse-engineer the calculator logic to rebuild it under a different brand
  • Use our content to train machine learning models without permission
  • Misrepresent our calculators as being endorsed by any medical body or professional association (we aren't)
  • Embed our tools in services that provide medical advice or treatment recommendations

Intellectual Property

The design, written content, calculator code, and branding of FastingTimeCalculator.com are owned by us. Individual quotes, research citations, and attributed facts belong to their original authors and publications, we link to primary sources where possible and recommend you do the same when citing fasting research. You're welcome to quote short passages with attribution (name and a link back) under standard fair-use norms.

Limitation of Liability

You use FastingTimeCalculator.com at your own risk. We're not responsible for any health outcomes, weight changes, schedule disruptions, missed meals, or other consequences that may result from following fasting protocols referenced on this site. The calculators return mathematical results based on the inputs you provide, what you do with those results is your decision.

To the extent permitted by law, FastingTimeCalculator.com, its operators, contributors, and advertisers disclaim all warranties, express or implied, and are not liable for direct, indirect, incidental, consequential, or punitive damages arising from your use of the site.

Third-Party Links

We link to research papers, news articles, and other websites when referencing external sources. We're not responsible for the content, accuracy, privacy practices, or availability of sites we link to. A link is not an endorsement.

Changes to These Terms

We may update these terms from time to time. The "last updated" date at the top of this page reflects the most recent change. Material changes (new restrictions, new disclaimers) will be announced at the top of the page. Continuing to use the site after a change constitutes acceptance of the updated terms.

Contact

Questions about these terms go to contact@fastingtimecalculator.com. For how we handle your data, see our privacy policy.