Privacy Policy

Your privacy matters. This policy explains what little data we handle and how cookies and advertising work on 123calcs.

Last updated: June 29, 2026

Overview

This Privacy Policy explains how 123calcs handles information when you use our site. In short: the calculators run in your browser, and we collect as little as possible.

Information we collect

We do not require you to create an account or submit personal information to use any calculator. Values you type into the tools are processed in your browser and are not sent to or stored on our servers.

Like most websites, we may collect standard, non-identifying technical data such as browser type, device type and general usage statistics to help us improve the site.

Cookies and advertising

123calcs is supported by advertising. Third-party vendors, including Google, may use cookies to serve 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 visit to our site and other sites on the internet.

• You can opt out of personalised advertising by visiting Google's Ads Settings.
• You can also opt out of third-party vendor cookies via the relevant industry opt-out pages.
• Most browsers let you block or delete cookies through their settings.

Analytics

We may use privacy-respecting analytics to understand which tools are popular and how the site performs. This data is aggregated and does not identify you personally.

Children's privacy

123calcs is a general-audience site and is not directed at children under 13. We do not knowingly collect personal information from children.

Your choices

Because we do not collect personal accounts or store your inputs, there is no personal profile to access or delete. You can control cookies and ad personalisation through your browser and the ad-network settings linked above.

Changes

We may update this policy as the site evolves. The "last updated" date above shows the most recent revision.

Contact

If you have any questions about this Privacy Policy, please reach us through our contact page.