Privacy policy
Your numbers and calculations belong to you. We believe calculation tools should respect user privacy by default.
Last updated: October 2026
1. Client-side calculations
All calculations performed on PercentagesCalculators occur directly within your web browser using client-side JavaScript. The numbers you enter, the formulas evaluated, and the results generated are never sent to our web servers, never logged, and never stored in any database.
2. Cookieless web analytics
To monitor site reliability and understand which calculators are most helpful, we use privacy-focused analytics services that do not track personal identities. We do not use tracking cookies, do not collect personal identifying information (PII), and do not profile users across different domains.
3. Local device storage
When you adjust settings such as your preferred decimal precision (e.g., .00 or .000), this preference is saved solely in your local browser storage (localStorage) on your device. It is never transmitted to our servers and can be cleared at any time through your browser settings.
4. Third-party advertising
We may display non-intrusive advertisements served by third-party advertising partners (such as Google AdSense) to support site hosting and maintenance. Third-party vendors may use cookies to serve ads based on prior visits to this or other websites. You may manage or opt out of personalized advertising at any time by visiting Google Ad Settings or aboutads.info.
5. Contact regarding privacy
If you have questions or concerns regarding our privacy practices, you can contact us at contact@percentagescalculators.com.