Contact Calculator Matters
Send feedback, report a calculation issue, suggest an improvement, or ask a general question about the platform.
Get in touch
use the contact formOne inbox for everything — calculator corrections, workbook issues, broken links, privacy questions, accessibility feedback, and feature suggestions.
Send an emailIf the form or protected email display does not load, use: contact [at] calculatormatters [dot] com.
Direct routes
We manually review calculation, source, accessibility, privacy, copyright, and advertising-related messages. A specific response time cannot be guaranteed.
What to include
For a calculation correction
- Calculator page URL
- Inputs entered
- Result shown
- Result expected
- Any source or reasoning that helps verify the issue
For a workbook issue
- Calculator name
- Workbook file name, if visible
- What did not work
- Device or browser, if relevant
For a feature suggestion
- Calculator or category
- Use case
- What output or comparison would help
Calculator Matters can help clarify how a calculator works, fix errors, and improve explanations. It does not provide personalised financial, tax, legal, investment, medical, or professional advice.
Need to report a calculation issue?
Use the contact form or email us at our contact address with the calculator URL, inputs, and expected result — see how reports are handled below.
How error reports are handled
Accuracy reports are the highest priority. Include the calculator name or URL, the exact inputs, the result you saw, and the result you expected. We reproduce the issue, then classify it — a formula error, an input/unit error, a display or rounding issue, a content error, or working-as-intended (usually an assumptions difference, which we then state more clearly).
We correct the formula, input handling, or wording at the source, re-run the calculator's mapped checks where available, and update the page's review date after the substantive fix. Missing automated coverage remains visible in the publish gate. For a fix that changed a published result, we note what changed so returning users understand why a number may differ.
We aim to acknowledge reports within a few business days. As a small operation we cannot promise a guaranteed response time, but accuracy reports come before everything else.