Privacy Policy

1. Client-Side Calculation Privacy

Arch Calculator is built as a client-side calculation utility. All geometric computations (radius, arc length, central angle, sagitta), SVG vector diagrams, offset-coordinate stepping tables, and carpenter fraction conversions are executed entirely in your browser using client-side JavaScript. We do not transmit, record, or store the specific architectural dimensions, spans, or rises you enter into our calculators on our servers.

2. Information You Voluntarily Provide

If you contact us via direct email (support@archcalculator.com) or through our website contact form, we collect your name, email address, and message contents. We use this information solely to answer your technical questions, verify mathematical equations, or assist with jobsite layout troubleshooting. We do not sell, rent, or lease your personal contact information to third parties.

3. Cookies & Aggregate Analytics (Google Analytics)

We use Google Analytics 4 (Measurement ID: G-G9VW2Y4YC3) to understand aggregate website performance, popular calculation tools, and browser compatibility. Google Analytics collects standard internet log information and visitor behavior in anonymous form, such as browser type, operating system, approximate geographic region (country/city level), and visited pages.

Google Analytics uses first-party cookies to track these interactions. You can opt out of Google Analytics tracking without impacting any calculation features by disabling cookies in your browser settings or by installing the Google Analytics Opt-Out Browser Add-on.

4. Third-Party Advertising & Google AdSense

We may display advertisements served by third-party advertising companies and networks, including Google AdSense. These companies may use cookies and web beacons to collect non-personally identifiable information about your visits to this and other websites in order to serve advertisements tailored to your interests.

• Third-Party Vendor Cookies: Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this website or other websites on the internet.
• DoubleClick / Advertising Cookies: Google's use of advertising cookies enables it and its partners to serve advertisements to our users based on their visit to our sites and/or other sites across the internet.
• Personalized Advertising Opt-Out: Users may opt out of personalized advertising at any time by visiting Google Ads Settings.
• Network Advertising Initiative & DAA Opt-Out: Alternatively, you can opt out of a third-party vendor's use of cookies for personalized advertising by visiting the Digital Advertising Alliance Consumer Choice page at aboutads.info/choices or the Network Advertising Initiative opt-out page at optout.networkadvertising.org.

5. European Economic Area (EEA), UK & Swiss User Consent

In compliance with the Google EU User Consent Policy and applicable data protection regulations (including the EU GDPR and UK GDPR), users located in the European Economic Area, the United Kingdom, and Switzerland are presented with a consent choice mechanism. We integrate with an IAB Europe Transparency and Consent Framework (TCF v2.2) certified Consent Management Platform (CMP) to collect, manage, and respect your preferences regarding advertising and analytics cookies. You may modify or withdraw your consent at any time via the cookie settings on this site.

6. Your Data Rights (GDPR, UK GDPR & CCPA/CPRA)

Depending on your jurisdiction, you have specific legal rights regarding your personal information, including:

• The right to access the personal correspondence we hold about you.
• The right to request correction of inaccurate personal data.
• The right to request deletion of your contact correspondence.
• The right to opt out of the sale or sharing of personal data (note: we do not sell personal data).

To exercise any of these rights, please contact our privacy desk at support@archcalculator.com.

7. Contact Information

For inquiries or feedback regarding this Privacy Policy or our data practices, reach our editorial and engineering team at: