Privacy Policy

Last updated: November 7, 2026.

This site has no accounts, forms, or analytics, and it shows no ads of its own. The calculator runs in your browser and does not send what you enter anywhere.

Information we collect

Like most web servers, ours keeps standard access logs, which include IP addresses, pages requested, and browser details. We use these logs to run and protect the site.

We keep these logs for about 15 days, then they are deleted automatically. They are stored on the server we rent to host this site. We don’t sell them or share them with advertisers. We would disclose them only if the law required it.

Requests to this site pass through Cloudflare, which provides our network and security services. Cloudflare processes details such as your IP address to deliver the site and protect it from attacks. It handles this information under its own Privacy Policy.

If you email us, we use your message and address only to reply.

Cookies and similar technologies

This site does not set cookies of its own, and it does not add tracking pixels.

Third parties can still use these technologies:

• Cloudflare: Cloudflare may set a cookie when it needs to check traffic for security reasons.
• Amazon images: Product images load from Amazon’s servers, so Amazon may receive your IP address and browser details when you view them. Amazon may also read or set its own cookies at that point.
• Amazon links: We take part in the Amazon Associates Program. Links to Amazon identify this site, so Amazon can tell that you came from here and credit us for qualifying purchases. Amazon may use cookies and similar technologies to record the visit.
• Other retailers: If you follow a link to another retailer, that site’s own privacy policy applies.

Amazon handles this information under its own Privacy Notice.

Your choices

• Amazon ads: Choose whether to see interest-based ads from Amazon on its Advertising Preferences page.
• Other ad companies: Opt out of interest-based ads from many companies through the Digital Advertising Alliance.
• Your browser: You can block or delete cookies in your browser settings. Blocking cookies may affect how retailer sites work, and an opt-out saved in a cookie has to be set again after you delete it.

Children

This site is not directed at children under 13, and we do not knowingly collect personal information from them.

Changes and questions

We update this page when our practices change, and the date at the top shows the latest version. For questions, see our Contact page.