Local calculations
Calculator values are processed in your browser. This release does not submit income, rent, debts, vehicle values, exact trip details, or appliance inputs to a server. There are no user accounts or server-side saved calculations.
Loading the site and reference files still makes ordinary network requests. A hosting provider may process request information such as IP address, browser information, and requested URL. That is different from sending calculator values.
Saved scenarios and preferences
Saving a scenario stores its name, inputs, source-quality selections, and time on this browser through localStorage. Anyone with access to this browser profile may be able to view it. Local data is not synchronized between devices.
Recent calculations record only which tools you used, without automatically saving their financial values. Remembering gas price, work weeks, electricity rate, or utilities is optional. You can clear all calculator data below.
Copying, printing, and reports
Copied summaries and printed results include the values you choose to use. Sharing those outputs makes that information available to their recipients. The site does not encode financial values in share URLs.
The Contact page contains demo fields with sending disabled. No message is sent to a server. Calculator summaries can still be copied to your clipboard; your browser may request clipboard permission.
Analytics, advertising, and cookies
Remote analytics and advertising are disabled. No advertising scripts, trackers, or application authentication cookies are used by the calculator code in this release. Reference rates are served from a bundled site file, without an EIA request from your browser.
Before enabling any analytics or ads, the operator must configure an appropriate consent and privacy process, identify the providers, and update this notice.
Remove saved scenarios, recent tool history, and remembered preferences from this browser.
Reviewed September 5, 2026.