Privacy Policy

Welcome to CalcFormula (“we,” “our,” or “us”), available at calcformula.com. We provide free, browser-based construction calculators covering concrete, masonry, aggregates, drainage, slope, structural loads, and more — at no cost to you.

This Privacy Policy explains what information is collected when you visit our website, how it is used, and what choices you have. By using CalcFormula, you agree to the practices described here.

CalcFormula collects the following information automatically when you visit:

• Browser type, version, and operating system
• Pages visited and time spent on each page
• Referring URL (search engine or site that brought you here)
• Approximate geographic location (country/region, derived from IP address)
• Device type — desktop, tablet, or mobile
• Date and time of each page request

We do not collect your name, email address, phone number, or any values you enter into our calculators. All calculator inputs stay local to your browser session and are never transmitted to our servers.

Like most websites, our hosting provider automatically records standard server log data. This includes your IP address, browser user-agent string, pages requested, HTTP status codes, and timestamps. Log files are retained for a limited period for security and diagnostic purposes and are not shared with third parties except as required by law.

A cookie is a small text file stored in your browser by websites you visit. CalcFormula uses cookies for analytics and advertising as described below.

Analytics cookies

We use Google Analytics to understand how visitors use our calculators in aggregate — which tools are most popular, time on page, and traffic sources. Google Analytics sets cookies such as _ga and _gid. No personally identifiable information is collected through analytics. You can opt out by installing the Google Analytics opt-out browser add-on.

Advertising cookies

We display ads through Google AdSense. Google and its advertising partners use cookies to serve ads based on your prior visits to this and other websites. See Section 5 for full details and opt-out options.

Managing cookies in your browser

• Google Chrome — manage cookies
• Mozilla Firefox — manage cookies
• Apple Safari — manage cookies
• Microsoft Edge — manage cookies

Disabling cookies may affect ad relevance and some site features.

CalcFormula uses Google AdSense, operated by Google LLC, to display advertisements. Ad revenue is what allows us to keep every calculator free.

How Google uses data

Google may use the DoubleClick cookie and similar technologies to serve personalized advertisements based on your interests and browsing history across the web. Google’s use of advertising cookies enables it and its partners to serve ads based on your visit to our site and other sites on the internet.

Google’s data practices are governed by the Google Privacy Policy.

Opt out of personalized ads

Opting out of personalized ads does not stop ads from appearing — it means ads will no longer be tailored to your interests.

We use automatically collected data only for these legitimate purposes:

• Monitoring and improving website performance and reliability
• Understanding which calculators are most useful to visitors
• Diagnosing technical issues and server errors
• Detecting and preventing fraudulent or abusive traffic
• Complying with applicable legal obligations
• Enabling Google AdSense to display relevant advertisements

We do not sell, rent, or trade any personally identifiable information to third parties for their marketing purposes.

Our pages may link to external resources such as building codes or material references. CalcFormula has no control over those sites and is not responsible for their privacy practices. Third-party services we use include:

• Google Analytics — website usage analytics  Privacy Policy
• Google AdSense — display advertising  Privacy Policy

CalcFormula is a general-audience website and is not directed at children under 13. We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will promptly delete it.

Depending on where you live, you may have rights to access, correct, or delete data we hold about you. Because CalcFormula collects minimal data, most requests are satisfied simply by clearing your browser cookies.

California residents (CCPA/CPRA): You have the right to know what data we collect, to request deletion, and to opt out of the “sale” of personal data. CalcFormula does not sell personal data. Contact us below for any requests.

EU / EEA / UK residents (GDPR / UK GDPR): Our lawful basis for processing automatically collected data is our legitimate interest in operating the site. You have the right to access, rectify, or erase your data, and to complain to your local data protection authority.

We may update this Privacy Policy to reflect changes in our practices or applicable laws. When we make material changes, we will update the “Last updated” date at the top of this page. Continued use of CalcFormula after any changes constitutes acceptance of the updated policy.