Last updated: September 2026
Calculator inputs
All calculators run entirely in your browser. The numbers you enter are processed locally on your device and are never transmitted to us or any third party.
Cookies and analytics
This site uses Google Analytics 4 to measure page views and engagement (which pages are visited, how far readers scroll, which outbound links are clicked). Calculator inputs are processed locally in your browser and are never sent to Google or any third party. Google Analytics sets its own cookies and processes IP addresses under Google's privacy policy; there are no advertising networks or cross-site trackers beyond it. If advertising is added in the future, this page will be updated first, before anything new goes live.
Third-party advertising
If third-party vendors serve ads on this site, they may use cookies based on your prior visits to this or other websites. You may opt out of personalized advertising where legally required.
Emails you send us
If you contact us, your email address and message are kept only so we can reply. They are never sold, shared with advertisers, or added to a mailing list — there isn't one. If you would like your message deleted once it is resolved, just ask.
Changes
If this policy changes materially, the "last updated" date above will change.