Report an Error
Found a wrong number?
This site's whole claim is that its charts are checked. If one is wrong, this form is how it gets fixed.
Reports are read in order, checked against the sources, and — when the report is right — the correction is made in the calculator's data, the affected pages' worked examples are re-verified, and the pages' "last verified" dates are updated. If the figure was right and the page was unclear, the page gets the clarification instead. The form composes an email in your own mail app; nothing is sent until you press send.