Contact
To report a formula error, ask where a number came from, or request a change, email contact@healthtools.icu.
Formula corrections are the most useful thing you can send: name the publication and the table or page, and we will re-check the record behind that calculator.
Response time is usually within a week. When a correction is accepted, the affected page's reference-data section is updated and its retrieval date changes, so you can see that the numbers were re-checked rather than silently edited.
We do not accept sponsored tool requests, paid placements inside a calculator's results, or guest articles. Every calculator on this site exists because its formula is published and checkable, not because it was requested.
Press and research enquiries are welcome, including requests for the data record behind a page; ask for the tool name and we will send the record and its source list.