If you’re interested, you may also want to check out my previous article on how to hide text in Word. Now let’s talk about all the stuff we can hide in Excel!

How to hide tabs/sheets in Excel

To hide a sheet or tab in Excel, right-click on the tab and choose Hide. Pretty easy eh?
hide sheet excel
Once hidden, you can right-click on a visible sheet and select Unhide. All hidden sheets will be shown in a list and you can select the one you want to unhide.
unhide sheets

How to hide cells in Excel

Excel does not have the ability to hide cells in the traditional sense that they simply disappear until you unhide them, like with tabs I showed above. It can only blank out the cells so that it appears that nothing is in those cells, but it can’t truly “hide” them because of the fact that if you hide cells, what would you replace them with?
If you greyed it out, you could easily tell there is something hidden, defeating the purpose of “hiding” them. If you try to shift cells up and down, then when you unhide the hidden cells, where should everything shift? You can hide entire rows and columns in Excel so they are not visible, but can only blank out individual cells. Here’s how.
Right-click on the group of cells and choose Format Cells.
format cells
On the Number tab, choose Custom at the bottom and in the Type box, enter three semicolons (;;;), without the parenthesis.
hide cells in excel
Click OK and now the data in those cells is hidden. To get it back, follow the above procedure, but choose the original format of the cells rather than Custom. Note that if you type anything into those cells, it will automatically be hidden and it’ll look like you didn’t type anything into it. However, the original value in that cell will be replaced with what you typed.

How to hide rows and columns in Excel

If you want to hide an entire row or column, select the row(s) and column(s), right-click and select Hide.
hide rows excel
hide column excel
To unhide a row or column, you need to select the row/column before  and the row/column after the hidden row/column. For example, if Column B is hidden, to unhide it you would need to select column A and column C and then right-click and choose Unhide.
unhide column

How to hide formulas in Excel

Hiding formulas is slight more complicated than hiding rows, columns, and tabs. If you want to hide a formula, you have to do TWO things: set the cells to Hidden and then protect the sheet.
So, for example, I want to hide my sheet with the following secret formulas on them:
hide formulas excel
First, I will select three cells in column D, right-click and choose Format Cells. Now click on the Protectiontab and check the box that says Hidden.
hidden formulas
Note that this will not hide anything. You now have to click on the Review tab and then click on Protect Sheet.
protect sheet excel
You can enter in a password if you want to prevent people from un-hiding the formulas. Now you’ll notice that if you try to view the formulas (by pressing CTRL + ~), they will not be visible, however the results of that formula will remain visible.
I’m not sure why you would want to do this, but you can also click on the View tab and click on the Hidebutton under Split. This will hide the entire workbook in Excel!
So now you’ve learnt how to hide workbooks, sheets, rows, columns, cells, and formulas! That’s it. Enjoy!