Privacy Policy

ConvCalcs is operated by Akitha Medagoda, Auckland, New Zealand. If you have a question about privacy, please use the contact form on this page.

All calculations run in your browser. The values you type into a calculator are not sent to or stored on any server.

To make results shareable, your inputs are written into the page address (the URL). They only leave your device if you choose to share or bookmark that link. Anyone you send the link to can see those inputs.

The site uses your browser's local storage only to remember preferences, such as light or dark theme, metric or imperial units, Basic or Advanced mode and, where a page offers it, your last calculator inputs.

This information stays on your device, is not sent to us, and contains no personal information. You can clear it at any time in your browser settings.

If you use the contact form, your name, email address and message (and the address of the page you sent it from) are sent to us through Formspree, a form processing service.

We use this information only to reply to you. We do not sell it or share it with anyone else, and we keep it only as long as needed to deal with your enquiry.

Formspree processes form submissions on servers outside New Zealand (mainly in the United States). See Formspree's privacy policy.

The site uses, or will use once it is enabled, Cloudflare Web Analytics to count page views and see which pages are useful. It is cookieless, does not use local storage for tracking, and does not track individual visitors across sites.

The site is hosted on Cloudflare Pages. Like any web host, Cloudflare may process standard request data, such as your IP address, browser type and the pages requested, to deliver the site, keep it secure and measure performance. This processing may take place outside New Zealand. See Cloudflare's privacy policy.

The site does not show ads at the moment. It may show Google AdSense ads in future. If and when ads are shown:

• Third party vendors, including Google, use cookies to serve ads based on your prior visits to this website and 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 can opt out of personalised advertising by visiting Google Ads Settings, and learn more about how Google uses information at policies.google.com/technologies/ads.

In future, some links to products or suppliers may be affiliate or referral links. If you buy through one, the site may earn a commission at no extra cost to you. These links will be identified where they appear.

The site is intended for engineers and technical users and is not aimed at children under 16. We do not knowingly collect personal information from children.

Under the Privacy Act 2020 you can ask for access to the personal information we hold about you, and ask for it to be corrected. Please make your request through the contact form.

If you are not happy with how we handle your information, please contact us first. You can also make a complaint to the Office of the Privacy Commissioner.

This policy may be updated from time to time, for example when advertising or new features are added. The effective date at the top of this page shows when it was last changed.