Privacy

What this site collects

The calculators run entirely in your browser. The dimensions you type are never sent to us — they stay on your device and, if you share a link, in the URL you choose to share.

Visitor counter

The counter in the header records that a browser session visited, using a random identifier stored in your browser's session storage. It is not linked to you, it contains no personal data, and it is discarded when you close the tab. We keep a running total of sessions and a count of sessions active in the last five minutes.

Analytics

If you consent, we use Google Analytics to record which calculators are used, whether results are copied or printed, and which searches are run. We record the calculator involved, not the numbers you entered. Analytics loads only after you accept; decline and no analytics script runs at all.

Advertising

This site is funded by advertising. Where ads are shown, the ad provider may set cookies and use them to personalize what you see. You can decline personalization in the consent banner, and ads will still appear but will not be personalized.

Your choices

• GDPR (EU/UK): analytics and personalized advertising run only with your consent, and you may withdraw it at any time from the banner. You may request access to or deletion of any data held about you.
• CCPA (California): we do not sell personal information. You may opt out of personalized advertising through the consent banner.
• Blocking cookies or using a private window does not affect the calculators. They work identically with everything disabled.

Contact

For any privacy request, write to privacy@materialcalc.online and say what you would like done.