Privacy Policy

Last updated 2026-10-20.

What we collect

The calculators on this site run entirely in your browser. The numbers you type into a calculator (salary, balances, rates, goals, etc.) are never sent to our servers. They stay on your device and are used only to show you the result.

The only personal information we collect is what you choose to give us in the "Get new calculators when they drop" email box: your email address and the timestamp you signed up. We do not collect your name, IP address profile, or any calculator inputs.

How we use it

We use your email solely to let you know when a new calculator is published. We do not sell, rent, or share your email with any third party, and we do not use it for anything other than this notification.

How to opt out

Reply to any email from us asking to be removed, or contact us using the details on the Contact page, and we'll remove your email from the list.

Advertising and cookies (Google AdSense)

This site works with Google AdSense and may show ads served by Google and other third-party advertising vendors. These vendors may use cookies, web beacons, or similar technologies to collect information about your visits to this and other websites in order to show you ads they think are relevant.

You can see and adjust how Google personalizes ads for you at Google's own Ads Settings page, and you can opt out of personalized advertising from many third-party vendors through the Digital Advertising Alliance at optout.aboutads.info. We do not control the cookies these vendors set; see Google's own policies for how they use data collected while serving ads on this site.

Cookies and analytics

Beyond the advertising cookies described above, this site does not currently run any tracking pixel or third-party analytics script. If that changes, this page will be updated first.

Data storage

Email signups are stored in a Cloudflare D1 database tied to this site. No data is sold or shared with advertisers.

Contact

Questions about this policy? See the Contact page.

Educational estimates, not financial advice.

Get new calculators when they drop

Marcus adds a new calculator most weeks. No spam, just the link when it's live.

We store only your email and the date you signed up. See the privacy policy. Unsubscribe any time by replying.