Privacy Policy

Last updated: July 2026

This Privacy Policy explains how ZelsawCalc (“we,” “us”) collects, uses, and protects information from visitors to zelsaw.com.

Calculator inputs stay in your browser

Our calculators run entirely on your device. The heights, weights, dates, and other values you type are processed in your browser to display a result and are not transmitted to or stored on our servers. We do not ask you to create an account to use the tools.

Information we collect automatically

Like most websites, we and our service providers automatically collect technical data such as IP address, browser and device type, pages visited, and referring page. We use analytics (Google Analytics) to understand aggregate usage and improve the site.

Cookies and advertising (Google Ad Manager / AdX)

This site is monetized with Google Ad Manager, including Google's ad exchange (AdX), served via the Google Publisher Tag.

• Third-party vendors, including Google, use cookies and similar technologies to serve and measure ads based on your prior visits to this and other websites.
• Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to this and/or other sites on the internet.
• Google and its partners may use device identifiers and cookies (such as the DoubleClick cookie) to serve more relevant ads and to limit how often you see a given ad.

You can opt out of personalized advertising via Google Ads Settings, or opt out of interest-based ads from participating vendors at optout.aboutads.info and youronlinechoices.eu. Learn more about how Google uses data when you use our partners' sites or apps.

Consent management (GDPR / CMP)

For visitors in the European Economic Area, the United Kingdom, and other regions that require it, we use a Google-certified Consent Management Platform (CMP) to request consent for advertising and analytics cookies in line with Google's EU user consent policy and the IAB Transparency & Consent Framework. You can change or withdraw your consent at any time through the CMP privacy controls on the site.

Your California privacy rights (CCPA/CPRA)

California residents may request access to or deletion of personal information, correct it, and opt out of its “sale” or “sharing.” We do not sell personal information for money, though the use of advertising cookies may be considered “sharing” for targeted advertising under California law. Use the opt-out links above or contact us to exercise your rights; we will not discriminate against you for doing so.

Children's privacy

This site is not directed to children under 13, and we do not knowingly collect their personal information.

Changes & contact

We may update this policy; the date above reflects the latest version. Questions? Email contact@zelsaw.com.