Contact Numerus

What you can contact us about

• Calculations and functionality: an incorrect sum, a field rejecting a valid date or a result that does not update.
• Articles and sources: a claim to check, an incomplete reference or a translation that changes the meaning.
• Accessibility: hard-to-read text, a difficult control or a keyboard navigation problem.
• Suggestions: a question the current pages do not answer or an idea for a useful tool.
• Personal data: questions about processing and exercising your rights.

What to include in a report

1. The page link and the language you were reading.
2. What you did and what you expected to see.
3. The first calculation step or passage that appears incorrect.
4. Your browser and device, if the issue is technical.

For calculation problems, try a fictional name and a test date. For an editorial correction, the book title and relevant passage help us check the observation. Remove personal information from screenshots; do not send identity documents or private confirmation links.

Looking for a personal interpretation?

The profile calculator and personal calendar provide complete results for free. You can inspect the calculation steps and explanations without an account or email address.

Numerus does not offer individual consultations through this page. If another calculator gives a different number, compare the method rules first: the difference may come from reduction choices or the letters included.

Corrections and privacy

A correction may also affect a translation or a calculator result. Our editorial process explains these checks. We do not guarantee a response time.

For information about data, read Privacy and cookies. The About Numerus page explains the project.