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Arbdar Calculator

Report an Error

Published

If a calculator here gave you an answer that looks wrong, we want to know. Corrections are the fastest way this site gets better.

What to send us

Email hello@arbdar.com with:

  • The page — the full address of the calculator you used.
  • What you entered — the exact values.
  • What you got — the result shown.
  • What you expected — and, if you have one, the source or method you are comparing against.

Those four things let us reproduce the problem immediately. Without them we are usually guessing.

What happens next

We reproduce the calculation, check it against the published formula, and correct the tool if it is wrong. We aim to reply within a few business days. Where a correction is significant, we note it on the affected page.

Suggesting a calculator

Missing a tool you need? Tell us what you were trying to work out and we will consider building it.

More about our process: How we check our maths.