Website calculator
Include the exact URL, inputs, units, browser, and a short explanation of the mismatch.
Support
Show us the inputs and expected result
For calculator help, send the page URL, every value and unit entered, the displayed result, and the result you expected. For BuildMath app help, also include the iPhone model and app version. Do not send private project documents, account credentials, payment details, or other sensitive information.
BuildMath for iOS
Include the app version, iPhone model, tool name, and whether the issue also appears after restarting the app.