Terms & Conditions
Last updated: June 2026 · Governing your use of Calculate Periods
Important Medical Disclaimer
Calculate Periods is an informational tool only. It is not a medical device and must not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional regarding your menstrual health.
1. Acceptance of Terms
By accessing and using Calculate Periods (the "Service"), you accept and agree to be bound by these Terms and Conditions. If you do not agree to these terms, please discontinue use of the Service immediately. These terms apply to all visitors and users of the Service.
2. Description of Service
Calculate Periods provides a free, browser-based menstrual cycle tracking and prediction tool. The Service includes a period calculator, ovulation predictor, interactive cycle calendar, symptom logger, and cycle insights dashboard. All functionality operates entirely within your browser using local storage — no data is transmitted to or stored on our servers.
3. Medical Disclaimer & Limitation of Medical Advice
The information provided by Calculate Periods is for general informational and educational purposes only. It is not intended to:
- ✦Constitute medical advice or diagnosis
- ✦Replace consultation with a qualified physician, gynecologist, or other healthcare professional
- ✦Serve as a method of contraception or pregnancy prevention
- ✦Be used for pregnancy planning without supplementary medical guidance
Cycle predictions are estimates based on average statistical models and your self-reported data. Actual cycle timing may vary due to many physiological factors. Do not rely on this tool as your sole method of fertility awareness or contraception.
4. Permitted Use
You may use the Service for personal, non-commercial purposes. You agree not to:
- ✦Attempt to reverse-engineer, scrape, or disrupt the Service
- ✦Use the Service to distribute malware or harmful code
- ✦Misrepresent the Service's capabilities, particularly regarding medical or contraceptive use
- ✦Use the Service in any way that violates applicable law or regulation
5. Intellectual Property
The Service, including its design, code, content, graphics, and educational materials, is the intellectual property of Calculate Periods. All rights are reserved. You may not reproduce, distribute, or create derivative works without explicit written permission. General educational content about menstrual health may be shared with appropriate attribution.
6. Accuracy of Predictions
Period and ovulation predictions are mathematical estimates based on your input data and average cycle models. Calculate Periods makes no warranties, express or implied, regarding the accuracy, completeness, or reliability of any predictions. Factors such as stress, illness, medication, hormonal changes, and other physiological conditions can affect actual cycle timing in ways our tool cannot predict.
7. Limitation of Liability
To the maximum extent permitted by applicable law, Calculate Periods and its operators shall not be liable for any direct, indirect, incidental, special, consequential, or punitive damages arising from:
- ✦Your use of or inability to use the Service
- ✦Reliance on any predictions, recommendations, or information provided by the Service
- ✦Loss of data from browser cache or local storage clearing
- ✦Any decisions related to pregnancy, contraception, or reproductive health made based on the Service
8. Service Availability
We strive to maintain continuous availability of the Service but do not guarantee uninterrupted access. The Service may be temporarily unavailable due to maintenance, updates, or factors outside our control. We reserve the right to modify, suspend, or discontinue any part of the Service at any time without prior notice.
9. Third-Party Links
The Service may contain links to third-party websites or resources for informational purposes. Calculate Periods is not responsible for the content, privacy practices, or availability of any linked third-party sites. Accessing third-party links is at your own risk.
10. Changes to These Terms
We reserve the right to update these Terms and Conditions at any time. Changes take effect immediately upon posting to this page, indicated by the updated date. Your continued use of the Service after changes are posted constitutes acceptance of the revised terms. We encourage you to review these terms periodically.
11. Governing Law
These Terms shall be governed by and construed in accordance with applicable laws. Any disputes arising from these Terms or the use of the Service shall be resolved through good-faith negotiation. If resolution cannot be reached, disputes shall be subject to the jurisdiction of the relevant courts.
12. Contact
If you have any questions about these Terms and Conditions, please contact us through our Contact page. We are committed to addressing your concerns promptly.