Privacy Policy
Last updated: July 2026
The numbers you type never leave your device. Every calculator on this site runs inside your browser. Your areas, thicknesses, rates and prices are not sent to us, not stored, and not seen by anyone.
What we collect
No accounts, no sign-ups, no forms. We do not ask for your name, email or any personal detail to use the tools. If you email us, we keep only that email so we can reply.
Basic analytics
We may use privacy-friendly analytics to see which pages are visited and which tools are used, so we know what to improve. It is counted in aggregate — it does not identify you.
Advertising and cookies
The site may show ads in the future, including Google AdSense. Google and its partners use cookies to serve ads based on your visits to this and other sites. You can turn off personalised advertising in Google Ads Settings, or opt out of third-party ad cookies at aboutads.info. Blocking cookies in your browser also works — the calculators keep running either way.
Your choices
Clear or block cookies whenever you like. Where the law gives you rights over your data — access, correction or deletion — just ask, and we will act on it.
Changes
If we add ads or change tools, this page is updated first, with a new date at the top.