Privacy Policy

Short version: we do not ask for your name, email, or address. We do not use cookies to track you across the web. The calculators run entirely in your browser — your measurements are not sent to our server.

What we collect

When you visit Blueprint Calc we record a small amount of aggregate, anonymous traffic data through Cloudflare Web Analytics: the page you viewed, the country you are in, the type of device (mobile vs desktop), and the referring site. This data is cookieless and cannot identify you individually. We use it to understand which calculators people find useful.

If we eventually turn on Google AdSense or a comparable ad network on this site, that third-party service will collect additional data per their own privacy policy. In that case we will update this page and surface a consent notice for visitors in the EU, UK, and California before any personalized ads are served.

What we do not collect

• We do not require accounts, sign-ups, or email addresses.
• We do not store any of the numbers you type into the calculators.
• We do not use tracking cookies or fingerprinting on this site.
• We do not sell your data. Ever.

Third-party links

Blueprint Calc links to Home Depot, Lowe's, Amazon, Angi, Modernize, and similar partners using affiliate links. When you click through, those sites will collect data per their own policies. We receive a small commission on qualifying purchases, at no extra cost to you.

URL-based state

The calculators encode your inputs into the URL (the ?length=12 part) so you can bookmark or share results. This happens entirely in your browser. We do not log URLs or query strings.

Contact

Questions about privacy? Reach us at our contact page.

Changes

If we materially change how data is handled, this page will be updated and the "Last updated" date above will change.