This policy explains what Rootwise (zjhbxf.com) does and does not collect when you use the tools, and what happens to what is collected. It applies to every page on the site - 22 tool pages and this one - and takes effect from 2026.
The inputs on the tool pages - amounts, durations, percentages, headcounts, dates - are read by your own browser and used in the calculation. Nothing is submitted to a server. When you reload or close the page those values are gone, because the site never receives them and has nowhere to keep them. You can verify this yourself: open the network panel in your browser developer tools, fill in a few numbers, and you will see no request carrying them.
The site serves advertising through Google AdSense and measures visits with Google Analytics. What that measurement sees is page views, referral channels, browser and device types, and geography - aggregate signals. It does not include the specific values you type into a tool. Google processes this information under its own privacy policy and terms, and the site neither seeks nor could obtain your tool inputs.
Advertising services may set cookies in your browser for targeting and frequency capping. You can clear or block them at any time in your browser settings; the core function of this site, which is every calculation, depends on no cookie at all and keeps working with them blocked. The tools themselves may use localStorage to remember your last set of inputs so you can carry on after a reload. That data lives on your device and disappears when you clear browser data.
Pages load icon fonts, stylesheets and ad scripts from third-party CDNs. Those requests carry your IP address and ordinary request headers - that is how the network works, not extra data collection by this site. No third-party component here requires a login, and nothing you type into a tool is passed to anyone.
This is a public collection of general-purpose tools, not a service designed for children, and it collects no identifying information about anyone. If you are below the age of majority where you live, please use it with a parent or guardian present.
Because we do not collect what you enter into the tools, there is no list of "your data" for us to export or delete - the data never left your device. The only thing associated with you is anonymous, aggregated traffic measurement, which does not point to a person. If you think a given aggregate should not be counted, the contact route in the footer is the place to raise it.
If the site later introduces anything that needs an account, syncing or a server-side record, this page will be updated first to say what is collected, why, and for how long, before that feature goes live. The date on the page moves with each revision. Where anything is unclear, this page is the reference and the official rules for your region come first.
This page covers the practices this site actually follows today. One common mistake to avoid is assuming that every tool on a site works the same way —here, calculations run entirely in your browser, so what you type is not transmitted to the server. Third-party services such as advertising or font providers operate under their own policies, which this page cannot describe on their behalf.
Where this stops: it is not legal advice, and it cannot cover every situation or jurisdiction. If a question here touches your legal rights, the handling of data belonging to children, or anything that crosses borders, follow the official rules that apply where you live.
Every calculator published here follows the same three-step pattern, so learning it once means you can use any of them: step 1, fill in the fields with the values you actually have; step 2, check that each number you typed uses the unit shown next to that field; step 3, read the answer together with the assumptions printed underneath it, because the result is only as reliable as the inputs behind it. There is no account to create, and no "submit" step that sends what you typed to a server.
One practical note for step 2: if you are converting between units, do the conversion yourself on paper first and then type the converted value in. Most wrong answers on these tools come from a unit mismatch rather than from a wrong formula.