Email [email protected] for a correction, a privacy question, or a note about the site.
Include the page address and the numbers you expected. We use that to compare your note with the formula. Please do not send account passwords, full identity documents, or medical records.
What to expect
We read mail about factual errors and privacy. A calculator result that differs from a bank or a clinic is often the formula working as published, not a broken page. The disclaimer explains that limit.
This address is not a hotline for emergencies, loans, or medical care.