Privacy Policy

1. Information We Do Not Collect

We do not collect, transmit, store, or process any personal information about you. Specifically, we do not collect:

• Your name, email address, phone number, or mailing address;
• Any account credentials (there is no account system);
• Payment or financial information (the Service is free);
• Device identifiers, IP addresses, or geolocation data through intentional tracking;
• Any data entered into the calculator forms.

2. How Your Calculations Work

All calculations performed by this Service — including all measurements, project parameters, DIY inputs, and results — are processed entirely within your web browser. No data you enter into any calculator form is transmitted to any server, stored in any database, or shared with any third party. When you close or refresh the page, all entered values are discarded. We have no access to any information you enter.

3. Cookies and Tracking Technologies

We do not use cookies, web beacons, pixel tags, local storage tokens, or any other tracking technologies to identify, profile, or monitor individual users. We do not engage in behavioral advertising, cross-site tracking, or any form of user profiling.

Your browser may set certain technical cookies as part of normal browser operation (such as session cookies for HTTPS connections), but these are set by the browser itself and contain no personally identifiable information. We neither set nor read application-level cookies.

4. Server Logs and Hosting

Our hosting infrastructure may automatically collect standard web server access logs, which may include your anonymized IP address, browser type, operating system, referring URL, and pages requested. This information is used solely for operational purposes such as diagnosing technical errors, preventing abuse, and understanding aggregate traffic patterns. It is not combined with any other data to identify individual users and is retained only as long as necessary for these operational purposes, typically no longer than 30 days.

5. Analytics

At the time this policy was written, this Service does not use any third-party analytics services. If we add analytics in the future, we will update this Privacy Policy before doing so, and any analytics implementation will use privacy-preserving settings (such as IP anonymization and no cross-site data sharing) to the greatest extent possible.

6. Third-Party Services

The Service does not integrate with any third-party services that collect user data (such as social media plugins, advertising networks, or data brokers). If external resources such as web fonts are loaded, they may be subject to the privacy policies of those providers. We minimize external dependencies to protect your privacy.

7. Children's Privacy

The Service is not directed to children under the age of 13, and we do not knowingly collect any information from children under 13. If you are under 13, please do not use the Service. Because we collect no personal information from any user, we have no mechanism by which a child's data could be inadvertently stored. If you believe a child under 13 has provided information to us in any way, please contact us immediately.

8. Your Privacy Rights

Because we do not collect personal information, there is no data associated with your identity that we could provide, correct, or delete upon request. If you are located in a jurisdiction with specific privacy rights (such as the California Consumer Privacy Act, the EU General Data Protection Regulation, or similar laws), those rights are effectively already fulfilled by our no-collection-by-design approach.

If you believe we may hold information about you in error, or if you have any privacy-related question, please contact us and we will respond promptly.

9. Data Security

Because we do not collect or store personal data, there is no centralized database of user information that could be breached. The Service is delivered over HTTPS to encrypt data in transit between your browser and our servers. All calculator logic executes in your browser, meaning your project details never leave your device.

10. International Users

This Service is operated from within the United States. If you are accessing the Service from outside the United States, please be aware that any operational data (such as server logs described in Section 4) may be transferred to and processed in the United States. By using the Service, you consent to this transfer. We apply the same privacy protections described in this policy to all users regardless of location.

11. Do Not Track

Some browsers offer a "Do Not Track" (DNT) setting. Because we do not track users under any circumstances, DNT signals have no additional effect on our Service — your privacy is protected regardless of your browser's DNT setting.

12. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. When we do, we will revise the effective date at the top of this page. If we make material changes — particularly if we begin collecting any personal information — we will take reasonable steps to notify users prominently before the changes take effect. Your continued use of the Service after any change in the Privacy Policy constitutes your acceptance of the new policy.

13. Contact

If you have questions, concerns, or requests related to this Privacy Policy, please reach out via the contact information provided on the About page. We take all privacy inquiries seriously and will respond within a reasonable timeframe.