Privacy Policy

The short version

The calculators run entirely in your browser. The numbers you type are never transmitted to this site or stored anywhere. What is collected is ordinary web-server and analytics data, described below.

Information we collect

• Calculator inputs — processed locally in your browser. Not sent, not logged, not stored.
• Server logs — IP address, browser user agent, requested URL and timestamp, kept by the hosting provider and our CDN for security and abuse prevention.
• Analytics — aggregate page views and referrers, used to understand which calculators are useful.

Cookies

This site itself does not set cookies for the calculators. Cookies may be set by third-party services described below, including advertising partners. You can block or delete cookies in your browser settings without breaking any calculator.

Advertising

If advertising is displayed on this site, it may be served by Google AdSense or other third-party vendors. Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this or other websites. Google's use of advertising cookies enables it and its partners to serve ads to users based on their visit to this site and/or other sites on the internet.

You may opt out of personalised advertising by visiting Google Ads Settings, or opt out of third-party vendor cookies for personalised advertising at aboutads.info. Users in the EEA, UK and Switzerland are shown a consent prompt in line with GDPR and the IAB Transparency and Consent Framework where required.

Your rights

Depending on where you live, you may have the right to access, correct, delete or restrict the processing of personal data, and to object to processing. Because this site does not maintain user accounts or store calculator inputs, most requests concern server logs held by the hosting provider. Requests can be sent to [email protected].

Under CCPA/CPRA, California residents have the right to know what personal information is collected and to opt out of its sale or sharing. This site does not sell personal information.

Children

This site is not directed at children under 13 and does not knowingly collect personal information from them.

Changes

This policy may be updated to reflect new features or legal requirements. The revision date at the top of this page always reflects the current version.

Contact

Questions about privacy: [email protected]