Privacy Policy

Last updated: October 2, 2026. This policy applies to truetoolcalc.com ("TrueToolCalc", "we", "the site"). By using the site you accept the practices described below.

The short version

Our calculators run entirely in your own web browser. We have no user accounts, no sign-up forms and no comment system, and we do not collect the numbers you type into a calculator. The site is supported by advertising (including Google AdSense), and those ad services use cookies as described in this policy.

Your calculator inputs stay on your device

Every calculator on TrueToolCalc is executed locally in your browser with JavaScript. The values you enter — dimensions, areas, quantities and preferences such as waste percentages — are processed on your device only. They are never transmitted to, stored on or logged by our servers, and they cannot be linked to you because we never receive them.

Advertising and cookies (Google AdSense)

TrueToolCalc uses third-party advertising services, including Google AdSense, to display ads. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website and/or other websites on the Internet.

• Google advertising cookies. Google's use of advertising cookies (including the DoubleClick cookie) enables Google and its partners to serve ads to you based on your visits to this site and other sites. These cookies record information such as the ads you have seen and the pages you visited before viewing an ad.
• Other ad partners. Other third-party vendors and ad networks may also use cookies, web beacons or similar technologies to measure ad performance and personalise ads when you visit this site.
• Opting out of personalised advertising. You can opt out of personalised advertising by visiting Google's Ads Settings: adssettings.google.com. You can also opt out of some third-party vendors' use of cookies for personalised advertising at aboutads.info/choices. Opting out does not remove ads; it means the ads you see will not be personalised.
• Google's policies. How Google uses data from sites that use its services is described in Google's Privacy & Terms: policies.google.com/technologies/partner-sites.

We do not control the cookies set by third-party advertisers. This policy covers cookies used on this site; each advertiser's own privacy policy governs the data it collects.

Analytics (Google Analytics)

We use Google Analytics (GA4) to understand aggregate usage of this site — for example, which calculators are most used and roughly where visitors come from. Google Analytics sets cookies (such as _ga) and collects usage data such as pages visited, approximate location, device and browser type. We use these statistics only in aggregate to decide which tools to improve; we do not use them to identify individual visitors, and we never combine them with calculator inputs (which, as noted above, never leave your device). You can stop Google Analytics recognising you on return visits by blocking cookies in your browser or by installing Google's opt-out browser add-on.

Our own cookies

TrueToolCalc does not set any first-party tracking cookies of its own, and we do not sell personal information. Any cookies present when you visit the site are set by the advertising and analytics services described above (or are strictly necessary for basic site delivery, such as load balancing by our hosting provider).

Server logs

Like most websites, our hosting and content-delivery providers automatically record standard request logs when pages are served — typically your IP address, browser type, the page requested and the time of the request. These logs are used to operate, secure and troubleshoot the site. We do not use them to build advertising profiles and we do not combine them with calculator inputs (which, as noted above, never reach us).

Controlling cookies in your browser

You can block or delete cookies at any time through your browser settings. Most browsers let you block all cookies, block third-party cookies only, or clear cookies for a specific site. Blocking cookies will not break our calculators — they work without any cookies at all — but the ads you see may be less relevant. See your browser's help pages for instructions (Chrome, Firefox, Safari and Edge all publish cookie-management guides).

Children's privacy

This site is a general-audience tool site and is not directed at children under 13. We do not knowingly collect personal information from children.

Changes to this policy

We may update this policy from time to time — for example if the advertising services we use change. Updates will be posted on this page with a revised "Last updated" date. Your continued use of the site after an update means you accept the revised policy.

Contact

Questions about this policy can be sent to jimny2026a@gmail.com, or see our Contact page.