Privacy Policy

This Privacy Policy explains what information BuildCalcWorld (“we,” “us,” “our”) collects when you visit https://buildcalcworld.org (the “Site”), how that information is used, and the choices you have. We have designed the Site to collect as little information as possible. Section 8 includes additional information for residents of California and other U.S. states with consumer privacy laws.

Summary

• You do not need an account to use the Site, and we never ask for your name to use a calculator.
• Everything you type into a calculator is processed in your own browser and is never sent to us.
• The Site itself does not set tracking cookies and does not use analytics software.
• We do not sell personal information for money.
• If advertising is shown, it is provided by Google AdSense, which may use cookies as described in section 4. You can opt out of personalized ads at any time.

1. Information we collect

Calculator inputs

Our calculators run entirely in your web browser. The measurements, prices and other values you enter are processed on your device. They are not transmitted to, stored on or logged by our servers, and they are discarded when you close or reload the page.

Messages you send us

If you email us at [email protected], we receive your email address, any name you include and the contents of your message. We use this information only to read and reply to your message, and we delete correspondence when it is no longer needed for that purpose.

The contact form on our contact page checks your details inside your browser only. It does not currently send or store anything, so no information entered in the form reaches us.

Technical information

When your browser requests a page, the server that delivers the Site necessarily receives standard technical information such as your IP address, browser type, the page requested, the referring page and the time of the request. Our hosting provider may keep this information in short-term server logs to deliver the Site, keep it secure and diagnose problems. We do not use these logs to identify individual visitors or build profiles.

2. Cookies and local storage

Cookies are small text files stored on your device by websites you visit. The Site’s own pages and calculators do not set cookies and do not save information in your browser’s local storage.

Cookies may be set by Google when advertising is displayed on the Site (see section 4). You can view, block or delete cookies at any time in your browser settings. Blocking cookies will not stop the calculators from working.

3. Analytics

We do not use Google Analytics or any other analytics or tracking software. We do not track which calculators you use or what values you enter.

4. Advertising and Google AdSense

To keep the Site free, we may display advertisements served by Google AdSense, a service of Google LLC. Advertisements are shown in clearly labeled spaces and are kept separate from calculator results. No advertising is loaded unless an AdSense account is active for the Site.

When advertising is active:

• Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website or other websites.
• Google’s use of advertising cookies enables it and its partners to serve ads to you based on your visits to this Site and/or other sites on the internet.
• You may opt out of personalized advertising by visiting Google Ads Settings. You can also opt out of many third-party vendors’ use of cookies for personalized advertising through the Digital Advertising Alliance at optout.aboutads.info or the Network Advertising Initiative at optout.networkadvertising.org.
• You can learn how Google uses information from sites that use its services at policies.google.com/technologies/partner-sites.

Where the law requires it, for example for visitors in the European Economic Area, the United Kingdom or Switzerland, you will be asked for your consent before advertising cookies are used, and non-personalized ads will be shown if you decline.

5. Third-party services and links

Apart from Google AdSense when advertising is active, the Site does not load scripts, fonts or embedded content from third parties. Our fonts are served directly from our own domain.

Our guides may link to external websites, such as manufacturer or government resources. We are not responsible for the content or privacy practices of those websites, and we encourage you to read their privacy policies.

6. How we use information

We use the limited information described above only to:

• deliver the Site and keep it secure and working properly;
• reply to messages you send us; and
• display advertising that helps keep the Site free.

We do not sell, rent or trade personal information for money.

7. Do Not Track and Global Privacy Control

Some browsers offer a “Do Not Track” (DNT) setting. Because there is no common industry standard for responding to DNT signals, the Site does not change its behavior when it receives one. This makes little practical difference: the Site itself does not track you across websites. Advertising cookies set by Google can be controlled using the options in section 4.

If your browser sends a Global Privacy Control (GPC) signal, we treat it as a request to opt out of the sale or sharing of your personal information, as described in section 8. The Site automatically asks Google to show you only non-personalized ads.

8. Your U.S. state privacy rights

This section applies to residents of California and of other U.S. states with comprehensive consumer privacy laws, such as Colorado, Connecticut, Virginia, Utah, Texas and Oregon. It is provided in line with the California Consumer Privacy Act as amended by the California Privacy Rights Act (together, “CCPA”) and similar state laws.

Personal information we collect

In the past 12 months, we have collected the following categories of personal information:

We do not collect sensitive personal information, such as Social Security numbers, financial account details, precise geolocation or health information. We keep server logs only briefly and email correspondence only as long as needed to respond to you.

Sale and sharing of personal information

We do not sell personal information for money. However, when personalized advertising is active, allowing Google’s advertising cookies to collect information about your visit may be considered “selling” or “sharing” personal information for cross-context behavioral advertising under California and other state laws. We do not knowingly sell or share the personal information of consumers under 16.

Do Not Sell or Share My Personal Information. You can opt out at any time by:

• turning off personalized ads in Google Ads Settings;
• enabling Global Privacy Control in a browser or extension that supports it;
• using the privacy choices message shown on the Site when advertising is active; or
• emailing us at [email protected] with the subject line “Do Not Sell or Share.”

Your rights

Subject to certain exceptions, you have the right to:

• Know and access the categories and specific pieces of personal information we have collected about you;
• Delete personal information we have collected from you;
• Correct inaccurate personal information;
• Opt out of the sale or sharing of personal information and of targeted advertising;
• Limit the use of sensitive personal information (we do not collect any); and
• Not be discriminated against for exercising any of these rights. The Site will work the same way for you whatever choices you make.

How to exercise your rights

Email us at [email protected] and tell us which right you want to exercise and your state of residence. Because we do not have user accounts, we will verify your request by matching the information you provide (for example, the email address you previously used to contact us) against the information we hold. You may use an authorized agent to submit a request on your behalf; we may ask for proof of the agent’s authority.

We will confirm receipt within 10 business days and respond within 45 days. If we need more time, we will tell you why and may extend this by up to another 45 days, as the law allows. If we deny your request, you may appeal by replying to our decision with the subject line “Appeal.” We will respond to appeals within the time required by your state’s law. If your appeal is denied, you may contact your state attorney general.

California “Shine the Light”

California residents may request information about disclosures of personal information to third parties for their own direct marketing purposes. We do not make such disclosures.

9. Children’s privacy (COPPA)

The Site is intended for a general audience and is not directed at children under 13. In line with the Children’s Online Privacy Protection Act (COPPA), we do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has sent us personal information, please email us at [email protected] and we will delete it promptly.

10. Security and retention

The Site is served over an encrypted HTTPS connection. We keep personal information only for as long as needed for the purposes described in this policy, and we take reasonable steps to protect it. No method of transmission over the internet is completely secure, so we cannot guarantee absolute security.

11. Where your information is processed

The Site is operated from Sri Lanka and may be hosted on servers in the United States or other countries. Google processes advertising data under its own policies. By using the Site, you understand that technical information may be processed outside your state or country.

If you are in the European Economic Area, the United Kingdom or Sri Lanka, you have similar rights to access, correct and delete your personal information, to object to its use and to complain to your local data protection authority. You can exercise these rights by emailing us.

12. Changes to this policy

We may update this policy when the Site or the services it uses change, and we review it at least once every 12 months. The “Last updated” date at the top of this page shows when it was last revised. Significant changes will be highlighted on this page.

13. Contact us

If you have any questions about this Privacy Policy or how your information is handled, email us at [email protected] or visit our contact page.