Last updated: October 2026. This policy covers concretecalc.nxtolerance.com — what we collect, what we don’t, and why.

The short version

ConcreteCalc is a static site — plain HTML, CSS and JavaScript generated ahead of time and served from Cloudflare. There are no accounts, no sign-in, and no database of yours. Every calculator on the site runs entirely in your browser tab: the dimensions, prices and densities you type are used to update the page and to update the URL so you can share it — your inputs are never sent to our servers and are not stored anywhere but your address bar.

What we don’t collect

• No names, emails, or accounts — there’s nothing to sign into.
• No calculator inputs or results on our servers — they live only in your browser.
• No analytics profiles, fingerprinting, or cross-site tracking built by us.
• No sales or rentals of personal data — there’s nothing to sell.

What is collected, honestly

Cloudflare request metadata. The site is served through Cloudflare’s CDN and Workers. Like any web request, when your browser loads a page Cloudflare sees standard request metadata — IP address, user agent, referer, timestamp — used to deliver the page and protect the site. This is infrastructure logging, not tracking we run, and it’s governed by Cloudflare’s own privacy policy.

A cookieless usage beacon. The site sends a small, cookieless hit to our own analytics worker when a page loads — page URL and referer — so we can see which pages get visited. No cookies, no identifiers stored on your device, nothing tied to you beyond that one request’s metadata.

Google AdSense. This site shows ads served by Google AdSense (pub-8472872609741180). Google may set cookies or use device identifiers to personalize or frequency-cap ads, and your interactions with ads are handled by Google under their own policies — not ours. You can opt out of personalized ads at Google’s ad settings; blocking cookies still works fine with everything else on the site.

Cookies

We don’t set any cookies ourselves. Cloudflare and Google may set their own (see above). The site works fully with cookies disabled — nothing in the calculators depends on them.

Changes and contact

If this policy changes, this page updates. Questions: hello@nxtolerance.com — see contact. For the limits of what the numbers mean, see the disclaimer.