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.

You worked hard to put that Excel sheet together, now protect it from unintended damage.

Four ways to protect your Excel formulas (free PDF) If a user inadvertently changes the formulas in your Excel workbooks, all your hard work could go out the window.

To make your cell non-editable in Excel, you have to lock the cell and use a password to protect the information. Learn how!