Privacy Policy

Calculator inputs. Calculations run in your browser. Numbers you type into a calculator are not sent to our servers unless a specific feature explicitly says so.

Usage analytics. We use privacy-respecting analytics to understand which pages are visited and how the site performs. We do not build advertising profiles.

Messages you send us. If you email us, we store your message so we can reply and follow up.

To operate the site, improve calculators and content, respond to your messages, and detect abuse. We do not sell personal information, and we do not share it with advertisers.

We use a small number of first-party cookies for essential site functions and aggregated analytics. You can clear or block cookies in your browser settings; the calculators will continue to work.

You can request access to or deletion of personal data we hold about you (typically: emails you've sent us). Email privacy@calcxo.com from the address in question and we'll respond within 30 days.

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

If we update this policy, the Last updated date at the top of this page changes. Material changes will be highlighted for at least 30 days.