Sessions and anonymous daily counts
A random session identifier is kept in sessionStorage and remains valid for 30 minutes of inactivity. It is replaced after that interval and is removed when the browser tab session ends. The analytics endpoint receives ordinary network request data. It processes the IP address transiently with a rotating daily salt to create a one-way daily anonymized visitor hash; the raw IP address is not stored. The user agent is reduced to a device category, and the hosting edge may add a country code for aggregated reporting. The daily hash is not designed to recognize a reader across days.
What appears in reports
Reports contain aggregated counts by date, site hostname, page path, referrer, device category and country. The random session identifier supports session totals; it is not connected to a name, account, email address or advertising identifier. Woodshop Numbers does not provide accounts, comments, uploads, checkout or contact forms.
Calculators run locally in your browser. Calculator inputs are not sent to the analytics service or stored on a server, and reloading the page resets them to the published defaults.
Hosting and security logs
The hosting and network providers may separately process ordinary request information such as IP address, requested URL, user agent, timestamp and security signals to deliver the site, prevent abuse and diagnose faults. Their handling is governed by their own terms and legal obligations.
Google preferred sources control
The footer carries an Add Woodshop Numbers to your Google preferred sources control. It is an ordinary link to Google’s own source settings and works with JavaScript turned off. When JavaScript is available, a script served by Google at news.google.com upgrades it so the confirmation appears in a Google dialog on this page instead of on a separate Google page. That script is requested from Google on every page of this site, so Google receives ordinary request data for it, and Google’s terms apply to that request and to any choice you confirm. Woodshop Numbers is not told whether you used the control, receives no identifier from it and sets no cookie for it. Blocking third-party scripts leaves the control working as a plain link.
External links
Some guides link to manufacturers, standards bodies and government sources. Following an external link sends your request to that provider, which may apply its own cookies, analytics and privacy policy. An external link does not mean Woodshop Numbers receives your activity there.
Changes
This notice was last updated on 26 August 2026, when the Google preferred sources control was added; cookie-free first-party analytics collection began on 26 July 2026. It will be updated before any material change to accounts, forms, advertising or data collection is enabled.