Contact Us
Last updated: September 8, 2026
hello@calcroost.com — we read everything and typically reply within 2–3 business days.
What to write to us about
- Report an outdated rate or fee — if a platform changed its fees or a tax rule moved, tell us and we will update the tool's defaults.
- Request a calculator — tell us the decision you are trying to make; that is the most useful framing.
- Report a math error — paste your inputs and the result you expected, and we will re-derive it against the official source.
- Feedback on wording, defaults, or mobile layout.
- Advertising and partnership inquiries.
A note on support
All calculators run locally in your browser and require no account, so there is nothing to reset, recover, or troubleshoot on our side. If a tool misbehaves, tell us your browser and device and we will reproduce it.
We cannot give personal financial, tax, or legal advice — for that, please consult a qualified professional in your jurisdiction.