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Report a Calculator or Website Problem
If a calculator gives an unexpected result, a page does not load correctly, or you notice a broken link or display problem, please tell us using the form below. Clear details help us reproduce and fix the issue faster.
What to include in your report
- The URL or name of the affected calculator or page
- A short description of what happened and what you expected
- The values and units you entered, if the problem involves a calculation
- The steps needed to reproduce the problem
- Your device, operating system, and browser
- Any error message shown on the page
Please do not include passwords, payment details, medical records, or other sensitive personal information. For calculation errors, an example using non-sensitive test values is usually enough.
What happens after you submit
We review reports to identify calculation, content, compatibility, and accessibility problems. A report may lead to a calculator correction, clearer instructions, a broken-link repair, or an improvement for a particular browser or screen size. We may contact you if more information is needed, but a reply is not guaranteed for every submission.