Privacy Policy

Effective October 27, 2026

MarginGauge ("we", "this site") is a free calculator and reference site. We designed it to collect as little data as possible.

What we collect

Nothing you enter leaves your browser. All calculator inputs and results are computed locally on your device. We do not transmit, store, or sell anything you type. We do not require accounts and do not ask for personal information.

Automatic data and cookies

Like most websites, our hosting provider may log standard technical information (IP address, browser type, pages visited) for security and analytics. We use privacy-respecting, cookieless analytics where possible.

Advertising

This site is supported by advertising. We plan to use Google AdSense and similar partners, which may use cookies or device identifiers to serve personalized ads. You can opt out of personalized advertising via Google Ads Settings or aboutads.info. Where required by law (e.g., EEA/UK/California), consent is requested before personalized ads are shown.

Third-party links

We link to eBay's official help pages for fee verification. We are not responsible for those sites' practices and are not affiliated with eBay Inc.

Contact

Questions: hello@margingauge.com. Changes to this policy will be posted on this page with a new effective date.