Send a message
Email [email protected] with calculation questions, suspected errors, accessibility barriers, or technical problems. Please do not send passwords, payroll records, medical details, or other sensitive information. Calculator inputs needed to reproduce an issue can usually be simplified.
What helps us investigate
Include the page URL, the exact inputs and units you used, the result you expected, and the result you received. A browser and device name can help when the issue concerns layout, keyboard behavior, printing, or copying. If a share link reproduces the problem, remember that anyone receiving that link can read the values stored in its URL fragment.
Response expectations
This is an independently run site, so replies are not immediate and a response time is not guaranteed. Clear correction and accessibility reports are prioritized. We cannot provide legal, payroll, medical, or individualized professional advice by email.