Contact
Questions, corrections, and tool requests are all welcome. The message goes straight to the person who maintains the calculators.
If you are reporting a wrong result
Include the exact values you entered, what the calculator returned, and what you expected instead. Date bugs are usually specific to a particular combination of inputs, so a vague description is hard to act on and a precise one is often enough to find the problem immediately.
Leap years, month-end dates, and spans that cross midnight or a year boundary are the usual suspects. If your case involves one of those, mention it.
If you are requesting a calculator
It helps to know what you were trying to work out and what you searched for before landing here. Business-day counting and timezone conversion are the two most requested gaps at the moment, and both are on the list.
Send a message
Frequently asked questions
How quickly will I get a reply?
Messages are read, but this is a small site rather than a support desk, so a reply may take a few days.
Can you add a calculator I need?
Possibly. Requests that describe the actual problem you are solving are the most likely to get built, since they make the edge cases clear.
Do you accept guest posts or link requests?
Unsolicited link-building requests are not accepted.