Privacy

Last updated October 2026.

• Your calculator inputs never leave your device. All math runs in your browser. Nothing you type is sent to us or anyone else.
• Remembered inputs: so you don't have to start over, your inputs are saved in your own browser's local storage. "Reset" clears them. We can't see them.
• No accounts, no forms, no ad tracking.
• Visit counting: we may use a cookie-free, privacy-focused counter that records page views and button clicks in aggregate. It doesn't identify you or follow you to other sites.
• Fonts: the page loads fonts from Google Fonts, which receives your IP address to deliver them.
• Links to other sites (installers, quote marketplaces, the IRS, Etsy) have their own privacy policies. Affiliate links may let that site know you came from here.