Corrections

If a Numberwright result, rule or number looks wrong, we want to know.

How to report a mistake

Send the page address, the numbers you entered, the result you expected, and the source that says so. Contact details coming soon.

What happens next

We check the source. If the calculator is wrong, we fix the formula, add a test that would have caught it, update the page and record the change below.

Corrections log

No corrections so far.