Contact CalculatorFormula.com
Use this page to get in touch about anything on the site. The messages worth writing in about, roughly in order:
- A calculator returning the wrong answer. This is the one that matters most. Give the inputs you entered, the answer the page returned, and the answer you expected.
- A bug. A calculator that doesn't respond, steps that don't appear, a layout that breaks on your phone. Naming your browser helps.
- A formula the site doesn't cover. Especially one people are taught or use by name, which is how most visitors arrive here.
- Press or business enquiries. Advertising, partnerships, and similar.
Every calculator on this site runs in your own browser, and nothing you type is sent anywhere. That is good for your privacy and awkward for diagnosis: there is no server-side log of your session to look up afterwards. A report has to carry enough detail to reproduce the problem on its own.
Reporting a Wrong Result
Each calculator here is defined by a formula and a set of named inputs, and the worked steps shown beneath the answer come from that same definition. A wrong answer is therefore a wrong definition, and it is wrong for everyone using the page — which is why these reports are worth sending and why they get fixed quickly.
What makes a report actionable:
- The page, by name or URL. Several calculators solve related problems with different assumptions; naming the one you used avoids a guess.
- Every input you entered, with its units. A formula that assumes radians given degrees, or metres given centimetres, returns a confidently wrong number. Say which units you typed in.
- The answer you expected, and where it comes from. A textbook, a worked example, or a standards definition carries more weight than another website, which may be repeating the same error.
Reports that arrive with those three things get checked against the site's known-answer tests, and a confirmed error is corrected in the formula definition itself, so the fix reaches the worked steps and the page's examples at the same time.
What Happens Next
Messages arrive in a single inbox that is read in batches rather than watched continuously. A realistic expectation is days rather than hours, and longer over holidays. There is no support desk behind this form, and no ticket number comes back to you.
Wrong-answer reports jump the queue, because a bad formula affects everyone using that page rather than the one person who noticed. Requests for new calculators are kept and revisited when new pages are planned; more arrive than can be built.
Not every message receives an individual reply. Every one is read.
Before You Write
A few questions come up often enough to answer here.
Is a small difference in the last decimal place an error? Usually not. Answers are rounded for display, and a value carried to more places elsewhere will disagree in the final digit. A genuine error shows up early in the number, not at the end of it.
Does the calculator want degrees or radians? Trigonometric pages state which they expect, and it is the single most common cause of an answer that looks wildly wrong. Check that before writing in — and if a page doesn't say, that is itself worth reporting.
Is a rounded intermediate step the problem? The worked steps are rounded for reading; the calculation behind them is not. If the steps reproduce your figure but the final answer differs slightly, the display is rounding, not the formula.
Is there an email address instead? The form is the way in. It routes everything to one place and avoids the spam a published address attracts, which is what keeps genuine reports visible.
If your question is about data, cookies, or advertising, the Privacy Policy and Cookie Policy will answer it faster than a message would.