Privacy policy
Short version: the calculators run in your browser, your inputs never leave it, and there are no accounts, no forms, and no user database anywhere on this site.
What runs on these pages
All calculator math executes locally in your browser; nothing you type is transmitted. Our host (Cloudflare) collects aggregate, cookie-free analytics (page views, country, browser family) that cannot follow you across sites. Infrastructure-level server logs (IP address, user agent, timestamp) exist briefly, as they do for every site on the internet.
What gets counted here
Nothing in a visit total says whether anyone got a tank size out of this, so six moments are recorded directly: a page loaded, a field changed, a copy, a print, a click through to a retailer or a quote service, and a click to any other site. Each is filed with the page path, which moment it was, the country the request came from, the date, and the referring site's host name. No cookie is set, no identifier survives the page, no IP address is written down, and the household size and fixture counts you enter are never sent anywhere. A browser asking not to be tracked, through Do Not Track or Global Privacy Control, is not counted.
Advertising
Where advertising appears it is served by Google AdSense, which may use cookies or device identifiers under Google's own policies, with consent mechanisms where law requires them. Referral links, where present, set their cookie on the destination site, not here, and are marked sponsored.
Write to the contact address and we keep the thread as long as it is useful and share it with nobody.
Questions: same address. Effective 2026-07-16.