Send a calculator request, bug, or feature idea.

About this page

• Use this page to request a calculator we have not built yet, report a formula error, suggest a correction, or ask about the library. Calculator requests and error reports are read by the team that builds the tools.
• When we confirm a reported error, we fix the formula and add an automated test that locks in the correct behavior so the same mistake cannot come back. Corrections are treated as a normal part of maintaining a reference.
• For sponsorship of a calculator category or a single calculator, choose the Advertising topic; rates, placements, and the sponsorship policy are on the advertising page.