Contact

Last updated November 13, 2026 · NoiMath

Email hello@noimath.com. It reaches a person, not a ticket queue, and there is no form that stores your details.

Most messages get a reply within a few business days. Messages about a calculation error are prioritised, because a wrong number on a calculator is worse than a slow reply.

Reporting a calculation error

Please include:

• The calculator you were using.
• The exact inputs you entered.
• The number you got, and the number you expected.
• If you have one, the source for the convention you expected.

Because every input is stored in the page URL, the fastest way to report a problem is to copy the link from the calculator and paste it into the email. That reproduces the exact analysis.

Requesting a calculator

Suggestions are welcome. The most useful ones describe a decision you are actually trying to make, not just a formula — that is what determines whether a tool is worth building. Tools that would require tax or legal judgments are out of scope by design.

Corrections to a guide

If a guide misstates a definition, cites a source incorrectly, or describes a convention differently from the calculator, say which page and which sentence. Guides are updated when a source changes or a definition is clarified, and the update date is shown on the page.

What we cannot help with

We cannot review a specific property, recommend a lender or an agent, tell you whether to buy something, or advise on a tax position. That is outside what arithmetic can answer, outside what this site does, and in several cases outside what an unlicensed site may do.

Privacy of correspondence

Emails are used to answer you and are not added to a mailing list or shared for marketing. The privacy policy describes the limited data the site processes.

Press and partnerships

For questions about the site, its methodology, or reuse of a calculator's output, use the same address and say what you need. Calculator outputs may be used freely in your own analysis, including commercially; republishing the site's text requires permission.