Privacy policy

What we collect

We do not ask for or store personal information. There are no accounts, and the calculators do not require anything about you.

Values you type into a calculator are processed in your browser. They are not sent to our servers. If you use the “copy link” button, your inputs are placed in the URL so the page can rebuild them — that link only goes wherever you choose to paste it.

Analytics

We use Cloudflare Web Analytics to count page views and understand which calculators are useful. It is cookieless and records aggregate data such as page URL, referrer, country and device type. It does not build a profile of you.

We also use Google Analytics 4, which sets a first-party cookie (named _ga) to tell repeat visits apart and to measure how people move between calculators. It records the same kind of aggregate data — pages viewed, referrer, approximate location from a truncated IP address, browser and device. We do not use it to identify you, and we do not upload or join it to any personal data. You can opt out for every site with Google's browser opt-out add-on, or by blocking cookies for this site.

Neither analytics tool runs inside our embeddable calculators. If you meet one of our calculators embedded on another website, that page is governed by its own privacy policy, not this one.

Advertising

This site shows ads served by Google AdSense. Google and its partners may use cookies or device identifiers to serve and measure ads, including personalised ads where you have consented. You can review and change your choices through the consent controls on this site, and manage Google's ad settings at myadcenter.google.com.

For more on how Google uses data from sites that use its services, see policies.google.com/technologies/partner-sites.

Your rights

Because we hold no personal data about you, there is nothing for us to export or delete. Requests relating to advertising data should go to Google through the links above.

Contact

Questions about this policy: hello@buildcalculators.com.