Cookie Policy

Strictly necessary cookies

These are required for the site to function correctly and cannot be switched off through the site itself. They do not track you across other websites and hold no personally identifying information.

• Hosting and security cookies used to distinguish genuine visitors from automated traffic.
• Any preference you set for cookie consent, stored so the banner is not shown on every page.

Analytics cookies

Set by Google Analytics 4 to measure how the site is used in aggregate. They help identify which calculators people find useful and which pages need improving.

• _ga: distinguishes one browser from another, retained for up to 2 years.
• _ga_*: maintains session state for the specific Google Analytics property.

Advertising cookies

When Google AdSense is active, Google and its partners may set cookies to serve and measure advertising, including ads personalised to your prior browsing.

• IDE: used by Google DoubleClick to record how you interact with ads, retained for up to 1 year.
• test_cookie: checks whether your browser accepts cookies, expires at the end of the session.
• Various partner cookies set by Google-certified advertising vendors.

How to control cookies

Every major browser lets you view, block and delete cookies through its settings. Blocking all cookies may affect how some sites behave, though this site's calculators work without them.

• Chrome: Settings → Privacy and security → Third-party cookies.
• Safari: Settings → Privacy → Manage Website Data.
• Firefox: Settings → Privacy & Security → Cookies and Site Data.
• Edge: Settings → Cookies and site permissions.

Opting out of personalised advertising

Opting out does not stop ads from appearing. It stops them being tailored to your browsing history. Use the links below to change your settings with the relevant advertising industry bodies.

• Google Ads Settings
• Digital Advertising Alliance opt-out (aboutads.info)
• European Digital Advertising Alliance (youronlinechoices.eu)
• How to manage cookies (aboutcookies.org)

Consent

This site is aimed at a United States audience. Where local law requires consent before non-essential cookies are set, that consent is collected through Google's certified consent management platform, and that choice can be changed at any time. Visitors elsewhere can use the browser controls listed above.