Privacy policy

Calculator inputs

Measurements, density, waste, and prices are calculated in your browser. The site does not send those values to a database or user account.

Share links and printing

If you choose Copy share link, the visible calculator inputs are placed in the page URL and copied locally when browser permission allows. Anyone who receives that URL can read those values. Do not put confidential project information into calculator fields. Printing uses your browser’s print function.

Hosting and operational logs

Vercel hosts the site and may automatically process standard request metadata, such as IP address, browser details, requested URL, and timestamps, for delivery, reliability, abuse prevention, and security.

Optional Google Analytics

Google Analytics loads only after you select Allow analytics. When allowed, it may use cookies and process page paths, referrer information, browser and device details, approximate location derived from network information, and usage events. The implementation removes URL query strings before sending page-location events, so calculator inputs stored in share links are not included. Advertising personalization and Google signals are disabled.

You may choose Continue without analytics and still use every calculator feature. To change a saved choice, use Analytics choices in the footer. If you withdraw consent after previously allowing analytics, the page reloads before future analytics requests. Google describes its processing in its Privacy Policy.

Accounts, payments, and advertising

The site has no account system, payment service, email form, remote application database, or advertising script. The analytics preference itself is stored in your browser's local storage.

Future changes

If advertising, contact forms, or another data processor is added later, this policy and consent behavior will be updated before that feature is enabled. See the About page for the correction policy.