Privacy Policy

Calculator inputs

Every calculation on this site runs locally in your browser using JavaScript. The dimensions, prices and quantities you enter are never sent to our servers, never stored in a database and never shared with anyone.

Information we collect

We do not ask you to create an account and we do not collect names, addresses or payment information. Our hosting provider records standard server logs, which may include IP address, browser type, referring page and timestamp, for security and reliability purposes.

Cookies and advertising

This site carries advertising through Google AdSense, which is what keeps the calculators free to use. Advertising cookies are only set after you accept them here. Until you do, Google Consent Mode keeps every advertising signal denied and ads serve in a non-personalised mode, chosen from the page content rather than from anything about you. Your choice itself is remembered in your browser local storage rather than in a cookie.

Analytics

We use Google Analytics 4 to see which calculators people actually use, so we know what to build next. It is configured with Google Consent Mode v2 and every storage signal starts denied, advertising included, and they all follow the same choice you make in the banner. Until you accept, Analytics runs in a cookieless mode that reports aggregate traffic without identifying returning visitors.

Accepting lets Analytics set its own cookie and measure sessions normally. It still never receives what you type into a calculator, because those values never leave your browser at all. Google processes this data as described in its own privacy policy, and you can opt out at the browser level with the Google Analytics opt-out add-on.

Change your analytics choice at any time — the banner will reappear.

Your choices

Because we do not collect personal accounts or profiles, there is generally no personal data for us to export or delete. If you have a question about data related to your visit, contact us and we will respond.

Children

This site is intended for a general and professional audience and is not directed at children under 13.

Changes to this policy

We may update this policy as the site changes. The revision date below always reflects the current version.