Contact
Have a question about one of our calculators, found a bug, or want to suggest a new calculator? We'd love to hear from you!
By Email
Write to us at: kontakt@rechenportal.de
We aim to respond to your inquiry within 1–2 business days.
Common Inquiries
Report a Calculator Bug
Please let us know which calculator you used, what inputs you entered, and what result you expected. This helps us quickly reproduce and fix the issue.
Suggest a New Calculator
We regularly expand our offerings. If you're missing a specific calculator, let us know — we'll evaluate whether we can build it.
Privacy & Cookies
For questions about your data or cookie settings, please read our Privacy Policy or send us an email.
Important Note
Please note that we cannot provide individual tax or legal advice. Our calculators serve as general information tools and do not replace consultation with a tax advisor or lawyer.