Privacy policy

Last updated October 16, 2026.

The short version

The calculator runs in your browser. Your room measurements are not sent to us. We don't use advertising cookies, and we don't sell personal data.

What is collected

• Hosting logs. Like any website, our hosting provider may log technical data such as IP address, browser type and the pages requested, for security and reliability.
• Shareable links. If you copy a result link, your measurements are in that link's address. Only share it if you're happy to.
• Analytics. We don't currently run analytics. If we add privacy-friendly, cookie-free analytics, we'll update this page first.

Affiliate links

When you click a link marked affiliate, you go to a third-party retailer. It may set cookies to track the referral, under its own privacy policy.

Children

This site isn't directed at children under 13.

Changes

We'll post any changes here with a new date.

Contact

Privacy questions: [email protected].