Privacy policy

Last updated: July 14, 2026

Data collection

Running Calculators does not collect, store, or transmit any personally identifiable information. All calculations are performed entirely in your browser using JavaScript. The data you enter into our calculators (distances, times, heart rates, etc.) never leaves your device.

Cookies and tracking

This website uses Google AdSense to display advertisements. AdSense may use cookies and similar technologies to serve ads based on your prior visits to this or other websites. These cookies enable Google and its partners to track your browsing activity across sites. You can opt out of personalized advertising by visiting Google Ads Settings or by installing browser extensions that block tracking cookies.

Analytics

We may use analytics services to understand how visitors use our calculators. These services may collect anonymous data such as page views, time on site, and browser information. No personal data is collected through analytics.

Third-party links

Our website may contain links to third-party sites. We are not responsible for the privacy practices of these external sites. We encourage you to review their privacy policies before providing any personal information.

Changes to this policy

We may update this privacy policy from time to time. Any changes will be posted on this page with an updated revision date.