Contact
The best — and only — way to reach us is by email:
We read everything that arrives. We are a small operation, so a reply may take a few days, and we cannot promise an answer to every message.
There is deliberately no contact form on this page. A form would mean collecting and transmitting what you type, and this site does not have a backend that receives your data — see the Privacy Policy. A plain mailto link keeps that promise intact.
Reporting a wrong result
This is the most valuable kind of message we get, and the one we act on fastest. With more than a thousand calculators and converters, a formula that is subtly wrong for a particular case is entirely possible. To help us fix it quickly, please include:
- the tool's URL (for example
https://utilsworld.com/mortgage/); - the exact values you entered;
- the result you got, and the result you expected;
- if you have one, a source for the correct figure — a standard, a textbook formula, or an authoritative calculator.
Reporting a bug or a broken tool
Please include the tool URL, your browser and version, your operating system, and what happened versus what you expected. If your browser shows an error, the text of it helps a great deal.
Suggesting a tool
Suggestions are welcome. The ones most likely to be built are those that can run entirely in the browser — anything requiring live market data, a third-party API, or a licensed data set generally cannot be done here without breaking the no-server, no-tracking design the site is built on.
Security
If you believe you have found a security issue, please email [email protected] with the details and give us a reasonable opportunity to respond before disclosing it publicly. We appreciate responsible disclosure and will credit you if you would like us to.
Privacy, legal and business
Questions about how the site handles data are answered in the Privacy Policy, and the terms of use in the Terms of Service. For anything those pages do not cover — including legal, licensing or business enquiries — email the address above and it will reach the right place.
Postal and legal entity
UtilsWorld is owned and operated by Bitake LLC, a privately held company. For formal or legal correspondence, please write to the email address above and we will provide a postal address where one is required.