Privacy Policy

Last updated: 2026-08-11

This site is a free tool. It is supported by advertising and may use cookies or similar technologies for ad personalization and measurement. We aim to collect as little data as possible.

What we collect

We do not require accounts, and we do not store personal data on any server. The calculator runs entirely in your browser — the numbers you enter are never sent to us.

Advertising

We display ads served by third-party ad networks (such as Google AdSense). These networks may use cookies to serve and measure ads, and may collect non-personally-identifiable usage data. Google's use of advertising cookies is described in Google's Privacy & Terms.

Analytics

We may use privacy-respecting analytics to understand aggregate usage (for example, which pages are most visited). This data is aggregated and does not identify individual visitors.

Your choices

You can opt out of personalized advertising through your ad settings (for example, Google Ads Settings) and through your browser's cookie controls.

Contact

Questions about this policy? Contact us via the contact information on the About page.