Understanding Error Types

Spreadsheets show error values when a formula cannot finish its job. Instead of guessing, the cell displays a short code like #DIV/0! or #N/A to tell you exactly what went wrong.

Errors are not bugs in the program. They are honest signals that your formula was asked to do something impossible, such as divide by zero or look up a value that does not exist.

Learning to read these codes is the first step to fixing them. In this lesson you will meet the most common error types and what each one is telling you.

The #DIV/0! error means a formula tried to divide a number by zero or by an empty cell. Division by zero has no mathematical answer, so the spreadsheet refuses to invent one.

This often happens in averages or ratios where the denominator has not been filled in yet. For example, calculating cost per unit when the unit count is still blank.

The fix is usually to check whether the divisor is zero before dividing, which you will learn later with IFERROR.