Contact
Last updated: September 11, 2026
Questions, corrections, bug reports and requests for new calculators are all welcome. A real person reads every message.
Write to hello@hardcalc.com and we will reply as soon as we can, normally within a few business days.
Reporting a figure that looks wrong
Corrections get priority. A calculator that is quietly wrong is worse than no calculator, so if a number does not match what you expect, we want to know. It helps if you include:
- Which calculator you were using, and the exact values you entered
- The result you got and the result you expected
- Your browser and device, if the problem looks like a display issue
Verified errors are fixed quickly, and we extend our automated tests so the same mistake cannot come back.
Requesting a calculator
Building the tools people actually ask for is how this site grows. Tell us what you need and what the existing options get wrong, and it may be next on the list.
What we cannot help with
We are not a lender, broker or financial adviser, and we cannot review your personal finances, recommend a lender, quote you a rate, or tell you whether a specific loan is a good idea for your situation. For that, speak with a qualified lender or financial professional. See our terms of use.