Privacy Policy
Our strict promise: zero tracking, zero server logging, and 100% local calculation.
1. Local In-Browser Processing
When you use Percentage Calculator, all mathematical computations are executed directly on your client device using native JavaScript. Your percentage numbers and values are never sent to external servers, cloud databases, or third-party APIs.
2. No URL Parameter Tracking
In compliance with our privacy-first philosophy, we do not serialize, persist, or expose your numerical inputs or calculations within URL query strings or browser history without your explicit action.
3. Third-Party Advertising (Google AdSense)
To provide this calculator as a free educational and mathematical utility, we display non-intrusive advertisements served through Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on a user’s prior visits to this website or other websites on the internet. Google’s use of advertising cookies enables it and its partners to serve ads to our users based on their visits to our site and/or other sites on the Internet.
For full details on Google’s advertising practices, review How Google uses information from sites or apps that use our services.
4. Managing Ad & Cookie Preferences
Users may opt out of personalized advertising by visiting Google Ads Settings or aboutads.info. You may also adjust your consent directly on this site via the Cookie Preferences button in the footer.
5. Strict Data Isolation: Math vs. Ads
Strict Data Isolation Guarantee: We enforce an absolute separation between our calculator logic and third-party advertising networks. Your numerical inputs, percentages, calculation steps, and results are never monitored, captured, logged, or shared with Google AdSense, advertisers, or any data broker. Calculations are executed 100% locally in your web browser.