Privacy Policy

Last updated November 1, 2026.

Summary

The values you type into our calculators are processed in your browser and are not sent to us. We use cookies for advertising and to remember your unit preference.

Information we collect

We do not ask you to create an account. If you email us, we receive your email address and message and use them only to reply. Our hosting provider may keep standard server logs, such as IP address, browser type and pages visited, for security and performance.

Calculator inputs

Calculations run in your browser. Your unit choice (imperial or metric) is stored in your browser's local storage so the site remembers it. You can clear it at any time in your browser settings.

Advertising and cookies

We use Google AdSense to show ads. Third-party vendors, including Google, use cookies to serve ads based on your previous visits to this website and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visits to this and other sites.

You can opt out of personalised advertising in Google Ads Settings, and opt out of some third-party vendors' cookies at aboutads.info. Read more in how Google uses information from sites that use its services.

Visitors in the EEA, UK and Switzerland

Where required, we ask for your consent before personalised ads or non-essential cookies are used, through a consent message certified under Google's requirements. You can change your choice at any time from the privacy settings link shown with that message.

Your rights

Depending on where you live, you may have rights to access, correct or delete personal data we hold about you. Contact us at [email protected].

Children

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

Changes

We will update this page if our practices change and revise the date at the top.