Contact
If you spot a calculation error, an unclear explanation, a broken page, or simply have a suggestion, we would like to hear from you.
We usually reply within 2–3 business days; formula verifications can take longer.
When reporting an error, please include
- The page URL (e.g.
/en/finance/mortgage) - The values you entered
- What you got, and what you believe is correct
- (Optional) A reference or the source of the formula
The more complete the report, the faster we can verify it. Once confirmed, we correct the calculation or text and update the page’s revision date.
What we can help with
- Calculation or formula errors
- Display, layout or compatibility issues
- Translation and wording problems
- Content suggestions and requests for new calculators
What we cannot provide
We do not give personalised medical diagnoses, medication advice, investment recommendations or legal opinions. Please consult a qualified doctor, dietitian, financial adviser or lawyer for those.
Advertising and partnerships
The site is supported by advertising. For advertising or content partnerships, write to the address above with a short description of your proposal.