Privacy Policy

Server Logs & Analytics

When you visit our site, our servers and analytics provider may automatically record information your browser sends. This may include:

• Your IP address (used for rough country/state location, not to identify you)
• Browser type, version, and screen resolution
• The pages you visit and approximate time spent
• The referring page or search query that brought you here
• Approximate region at the country or state level

Messages You Send Us

If you email support or submit feedback, we receive whatever you choose to include in that message — for example, the slab dimensions and bar-spacing values you describe, a screenshot of the calculator, and your email address so we can reply.

We use cookies and browser local storage to:

• Remember your unit preference (imperial ft/in or metric m/mm)
• Remember your last-used rebar inputs so you don’t retype them on return visits
• Remember which project type tab you were on (slab / footing / wall)
• Measure aggregate traffic and page performance through analytics
• Serve relevant ads if advertising partners are enabled

You can clear these at any time from your browser settings, and the calculator will keep working with its default imperial (ft / in) settings and default slab project type.

We may use third-party companies for analytics and to serve advertisements. These companies may use cookies and web beacons to collect non-personal information such as:

• Click and scroll behavior on our pages
• Browser type and version
• Time and date of visits
• Which ads were shown and whether they were clicked

This information is used to improve the site and show ads that may interest you. To learn more about behavioral advertising or to opt out, visit Network Advertising Initiative .

We use appropriate technical and organizational measures — including HTTPS/TLS, static hosting with modern CDN edge security, and minimal data retention — to protect the limited data we hold against unauthorized access, alteration, disclosure, or destruction.

Because your rebar inputs are processed in your browser and never uploaded, there is no server-side database of your slab dimensions, bar counts, or rebar schedules to breach. No method of transmission over the internet is 100% secure, but we keep what we do collect to an absolute minimum and delete logs on a rolling schedule.

• Clear your saved unit preference and rebar inputs any time via your browser’s site-data settings.
• Block or delete cookies in your browser; the calculator still works with its defaults.
• Opt out of interest-based ads through the Network Advertising Initiative link above.
• Request that any personal information you sent us by email be deleted from our inbox.

If you live in a region with data-protection rights (such as GDPR, UK GDPR, or CCPA), you may contact us to access, correct, or delete the personal data we hold about you.

Our Service is a professional concrete-construction tool and is not directed at children under 13. We do not knowingly collect personal information from children under 13.

If you are a parent or guardian and believe your child has provided us with personal information, please contact us and we will promptly remove it.

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated “Last updated” date.

We encourage you to review this page periodically. Continued use of our Service after any changes constitutes your acceptance of the updated policy.