Here is a tutorial to lock or hide only the formula cells in an Excel workbook. You can also lock formulas in all worksheets in a workbook.

Excel has formulas for almost all operations. Having said that, if you want to hide formulae if you are sharing your Excel spreadsheet with your colleagues or boss, you can do so.

First, select the cells with formulas you want to hide and protect, cells E4:E7 in our example sheet. Right-click the selection and choose Format Cells from the resulting submenu.

You can easily hide and unhide columns in Excel by individually revealing hidden columns or using the "Format" option to unhide all hidden cells.