Cookie Policy

What is a cookie?

A cookie is a small text file a website asks your browser to store. It's the standard way browsers and websites remember things across pages and across visits. Some cookies expire when you close the browser; others stay until they reach an expiration date or you clear them. The same general rules apply to closely related technologies such as local storage, session storage, and pixel tags — and we group all of those together as "cookies" for the rest of this page.

Categories of cookies on this site

Strictly necessary

The site works without any login or session cookie of its own, so this category is essentially empty in normal browsing. The hosting platform may briefly set technical cookies for security and abuse prevention (for example, to defend against denial-of-service attacks).

Preferences

Some calculators offer to remember the values you last entered, using your browser's local storage rather than a server-side cookie. That data lives on your device only — we don't read it. You can clear it at any time through your browser's site-data settings.

If you dismiss any notice or banner on the site, that decision may be remembered with a small first-party cookie so the same notice doesn't reappear on every page.

Analytics

We do not currently run a third-party analytics tool such as Google Analytics or a similar product. If we add one in the future, this page will be updated to describe what it collects and how to opt out.

Advertising

This site is supported by advertising. Google AdSense — and, where applicable, other advertising vendors that Google partners with — may set cookies and similar identifiers in your browser. Common purposes include:

• Serving relevant ads (either personalized or non-personalized, depending on your jurisdiction and consent).
• Limiting how often the same ad is shown to you (frequency capping).
• Measuring whether ads have been viewed or clicked, and detecting invalid traffic.
• Remembering ad preferences you've set with Google.

The exact cookie names used by AdSense and the Google ad network change over time; current information is documented at policies.google.com/technologies/cookies and policies.google.com/technologies/ads.

How to manage cookies

In your browser

Every modern browser lets you view, block, or delete cookies. You can usually find these controls under "Privacy" or "Site settings" in your browser's preferences. Blocking all cookies will not break the calculators on this site, since they don't depend on cookies. It will, however, affect how ads are served — most likely making them less relevant to you, not removing them.

In Google's controls

If your concern is specifically about ad personalization, the most direct controls are Google's:

• Google Ad Settings — turn ad personalization on or off across Google services and partner sites.
• Google's "How ads work" reference — what data is used and why.

Industry opt-outs

Industry-wide opt-out tools cover dozens of advertising vendors at once:

• Your Online Choices (EU/UK).
• Digital Advertising Alliance — WebChoices (US).
• Network Advertising Initiative opt-out (US).

These tools work by setting their own cookies that tell participating ad networks not to use behavioral targeting. If you clear cookies, you may need to re-do the opt-out.

"Do Not Track" and Global Privacy Control

The legal status of "Do Not Track" (DNT) and Global Privacy Control (GPC) signals varies by jurisdiction. We honor GPC where we are required to do so by applicable law. Our advertising partners apply their own approaches; see their policies for details.

Region-specific notes

EEA, UK, and Switzerland

Where required by local law, ads on this site default to non-personalized advertising unless you've consented to personalization, either through a Google-provided consent message or through your settings. Non-personalized ads still rely on a limited number of cookies for frequency capping, ad reporting, and fraud prevention.

California

You have the right to opt out of the "sale" or "sharing" of personal information for cross-context behavioral advertising. The most effective way to do that is to use Google Ad Settings (linked above) and one of the industry opt-outs, in addition to enabling Global Privacy Control in your browser. See our Privacy Policy for the broader CCPA/CPRA statement.

Updates to this policy

This page will be updated when we add or remove a partner that sets cookies, or when there's a material change to how existing partners handle data. The "Last reviewed" date at the top reflects the current version.

Contact

Cookie or tracking-related questions can be sent to the address on our Contact page, with "Cookies" in the subject line.