Contact

For formula corrections, calculation questions, or anything else about the site, reach out at contact@wrenchmath.com.

Reporting a calculation error

When reporting a calculation error, include: the calculator name, the exact inputs you entered, the result the calculator showed, and the result you expected. For display issues (layout, text cut off, or a number that looks formatted wrong) also note the browser and screen size, since those are typically rendering bugs rather than formula bugs. The more specific the report, the faster the fix.

Corrections are welcomed. Every calculator page carries a last-reviewed date; confirmed fixes are applied and the date is updated. This is a side project maintained in spare time, so responses are best-effort, typically within a few days, but there are no guarantees. Formula corrections take priority.