Privacy Policy
Last updated: June 21, 2026
This Privacy Policy explains how Machinist's Tools ("we," "us," "this site") handles information when you visit machinists.tools. We built this site as a free tool for machinists and want to be straightforward about what little data is collected and why.
1. Information We Collect
We don't require accounts, logins, or any personal information to use the calculators on this site. The only data collected comes from two third-party services we use to keep the site running and free:
- Google Analytics (GA4) — collects anonymized usage data such as pages visited, time on site, approximate location (country/region level), device and browser type, and referral source.
- Google AdSense — displays ads on this site and may use cookies or similar identifiers to personalize ads based on your browsing activity, unless you opt out.
Neither service collects your name, email address, or any directly identifying information through this site. IP addresses are processed by Google as part of standard analytics and ad delivery, which is why this falls under data protection law even though we don't separately store anything ourselves.
2. Cookies We Use
| Cookie | Provider | Purpose | Duration |
|---|---|---|---|
| _ga | Google Analytics | Distinguishes unique visitors | ~2 years |
| _ga_* | Google Analytics | Persists session state | ~2 years |
| IDE / test_cookie | Google AdSense / DoubleClick | Ad delivery & frequency capping | Up to 1 year |
| mc_consent | This site (local storage) | Remembers your cookie choice | Until cleared |
3. Your Consent Choice
When you first visit, a banner asks you to Accept or Reject non-essential cookies (analytics and ad personalization). Your choice is stored locally in your browser and applied automatically on future visits. You can change your mind at any time using the Cookie Settings link in the footer of every page.
4. Legal Basis for Processing (GDPR)
For visitors in the EU, UK, and EEA, we rely on your consent as the legal basis for analytics and ad-personalization cookies, collected via the banner described above. You may withdraw consent at any time with no effect on your ability to use the calculators themselves.
5. Your Rights
Depending on your location, you may have the right to:
- Know what data is processed about you
- Request access to or a copy of that data
- Request correction or deletion
- Object to or restrict certain processing
- Withdraw consent at any time
Because the data described above is processed by Google on our behalf, many of these rights are best exercised directly with Google as well as with us. See Google's Privacy Policy and Google Ads Settings to manage ad personalization directly. To reach us about this site specifically, email privacy@machinists.tools.
6. California Privacy Rights (CCPA/CPRA)
California residents have the right to opt out of the "sale" or "sharing" of personal information, which under California law can include data used for interest-based advertising. Rejecting non-essential cookies via our consent banner achieves this opt-out for this site.
7. Third-Party Services
This site uses Google Analytics and Google AdSense, both operated by Google LLC. Google may combine data collected here with data from other sites and services it operates. We don't control how Google uses this data beyond the settings we configure (such as consent mode signals). Review Google's policies directly:
8. Children's Privacy
This site is not directed at children under 16 and we do not knowingly collect personal information from children.
9. Changes to This Policy
We may update this policy from time to time as the site or the services it uses change. The "Last updated" date at the top of this page will reflect the most recent revision.
10. Contact
Questions about this policy or a data request can be sent to privacy@machinists.tools.