Privacy Policy

Last updated: November 11, 2026

What we collect

blow.tools does not require an account and does not ask for personal information. The numbers you enter into calculators are processed in your browser and are not sent to us. Your unit preference (feet or meters) is stored locally in your browser.

Advertising

This site may show ads served by third-party vendors, including Google. These vendors 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 based on your visits to this site and/or other sites on the Internet.

You can opt out of personalized advertising by visiting Google Ads Settings or aboutads.info. Visitors in the EEA and UK will be asked for consent before personalized ads are shown.

Affiliate links

Some pages may contain affiliate links, including links to Amazon. As an Amazon Associate we earn from qualifying purchases. Affiliate partners may use cookies to track purchases made through these links.

Analytics

We may use privacy-friendly analytics to understand which calculators are used, in aggregate. This data is not used to identify individual visitors.

Changes

We may update this policy as the site changes. The date at the top shows the latest version.