SHEET and SHEETS are two new functions that appeared in Excel 2013 and are also present in Excel 2016 and Excel 2019.

The **SHEET** function returns the index of the selected sheet. It starts counting from 1.

The **SHEETS** function returns the number of sheets in the reference.

## Get the Sheet index

The SHEET function returns the index of a sheet. Take a look at the following example.

**B5** – The function returns 1. This is the index of the current worksheet. If you write this formula in Sheet2 (second sheet), it’s going to return 2.

**B6** – You have to make a reference to a cell inside a worksheet, not directly to a sheet. That’s why this formula returns an error.

**B8** – In the SHEET function, it doesn’t matter to which cell you are going to reference.

## Get the number of sheets

The **SHEETS** function returns the number of sheets in a reference.

**B5** – The function SHEETS with no parameters returns all worksheets inside a workbook.

**B6** – This time the function returns 3 because it counts sheets between Sheet1 and Sheet3.

## Find hidden sheets

Let’s see how the function works when you hide one worksheet.

Between Sheet2 and Sheet4, there is a hidden sheet called Sheet3.

Here are the formulas and results.

**B5** – If you write the SHEETS formula with no parameters, it’s going to return all sheets, even the hidden ones. That’s why we have number 4.

**B6** – Despite writing the range between Sheet1 and Sheet4 (the hidden Sheet3 is between them), Excel doesn’t count the hidden sheet.

## Check for missing data

There is a way to check whether there is a value inside a particular cell inside a sheet.

To do this, you have to use the COUNTA function.

You have the following data for each sheet.

**Sheet2**

**Sheet3**

**Sheet4**

Now, let’s see how our formulas look like.

**C3** – The formula displays the number of sheets between Sheet2 and Sheet4.

**C4** – the COUNTA formula checks whether there is a data inside **B1** for each sheet.

**C5** – The difference shows how many values are missing.