Contact

Found a bug, missing a tool you need, or have a question about the site? Send us an email — feedback directly shapes which tools get built next.

What to write about

Wrong or surprising results: tell us the tool, exactly what you entered and what you expected. Because every calculation runs in your browser, we cannot see your input, so those details are what let us reproduce a bug.

A tool you wish existed: describe the question you are trying to answer rather than the interface — that is usually what decides whether we can build it well.

Privacy questions, or anything about how analytics and advertising work on this site.

Response times

Utileno is an independent project, so replies are not immediate. Bug reports about a wrong result are looked at first.

We cannot give financial, legal, medical or tax advice, and we cannot verify results for your specific situation — please see the Terms page.