Privacy Policy

Last updated 2026. Plain-English summary: we collect almost nothing, and the calculators run entirely in your browser.

What we collect

Calculator inputs never leave your device; all maths runs client-side. We use privacy-friendly, cookie-free analytics to count page views in aggregate. We do not build user profiles or sell data.

Cookies and advertising

If advertising is enabled, our ad partner (Google AdSense) may set cookies to show relevant ads and measure performance, as described in Google's policies. You can opt out of personalised ads via Google Ad Settings.

Affiliate links

Some outbound links are affiliate links. Clicking them may pass a referral identifier to the partner so we can be credited for a referral. See our affiliate disclosure.

Your choices

You can block cookies in your browser and use ad-blocking or tracking-protection tools without losing access to any calculator.

Contact

Questions about privacy? Reach us via the contact page.