In Excel for Windows desktop: every cell is already marked Locked, but locking only takes effect once you turn on Review ▸ Protect Sheet; to lock just some cells, first unlock the rest via Format Cells ▸ Protection (uncheck Locked), then Protect Sheet.
On this page7
Select all cells, open Format Cells (Ctrl+1) ▸ Protection, and confirm Locked is ticked (it is by default).
Select only the cells people should still edit, reopen Format Cells ▸ Protection, and uncheck Locked.
Go to Review ▸ Protect Sheet, choose what users may still do, and set a password if you want.
Click OK — the locked cells are now read-only while the unlocked ones accept input.
What this does
The mechanism surprises most people: in a new sheet every cell already carries the Locked attribute, yet that attribute does nothing until you protect the sheet. So locking works in two layers. The Locked checkbox under Format Cells ▸ Protection marks which cells should be frozen, and Review ▸ Protect Sheet is the switch that actually enforces it. To make only some cells uneditable, you unlock the ones people should still type in (uncheck Locked for them), then Protect Sheet so the still-locked cells become read-only. Before you run it on a workbook other people depend on, try it on a copy or a few rows first. Undo only reaches back through the current session, so a quick trial run is the cheapest way to see exactly what will change before the file is saved and shared. The difference between a quick fix and a sheet you can trust is the extra minute you spend validating “lock certain cells in excel”. Start on a copy or a tiny sample, keep the affected cells visible, and compare the result with the outcome you expected before you touch the real workbook. When this is a ribbon command, the selection matters more than the button: confirm the range, apply the command, then spot-check the output before saving. The point is a layout choice that keeps the sheet readable and sortable, but the practical win is that someone else can open the file and understand what happened without asking you.
A worked example
A form has input cells in column B and a calculated formula in column C that must not be touched. Select B2:B20, open Format Cells (Ctrl+1) ▸ Protection, and uncheck Locked — those input cells are now exempt. Leave column C as-is (still Locked). Now Review ▸ Protect Sheet, optionally set a password, and click OK. People can type freely in column B, but any attempt to edit the formula in C2 is refused with "the cell is protected". Lock cells when you are handing a sheet to other people and want them to fill in some fields without breaking your formulas, headers or layout — budget templates, data-entry forms, shared trackers. It guides input to exactly the right places while keeping the working parts of the model safe. If this is something you do often, add the command to the Quick Access Toolbar (right-click it on the ribbon and choose Add to Quick Access Toolbar) or learn its shortcut, so next time it is one click instead of a hunt through the menus.
In Google Sheets
Google Sheets has no Format Cells ▸ Protection ▸ Locked property. Protection there is set with Data ▸ Protect sheets and ranges: protect a range, or protect the sheet and tick "Except certain cells" for the inputs others may edit. Google notes that a protected sheet cannot lock cell formatting while still allowing edits to input values. Keep this page bookmarked for the next time the same question comes up. Better still, repeat the steps once in your own workbook — doing it yourself is what turns a copied answer into something you remember. Here is the takeaway for “lock certain cells in excel”: follow the steps at the top, check the result on the sheet itself, and keep undo in mind while you experiment. Done once deliberately, it becomes something you do from memory in Excel rather than something you search for again.
Common mistakes
- Ticking Locked and expecting it to work without protecting the sheet — the Locked attribute does nothing until Protect Sheet is on.
- Forgetting that all cells start Locked, so protecting the sheet without unlocking inputs freezes the entire sheet.
- Unlocking the cells you meant to protect by mistake — Locked must stay ticked on the formulas you want read-only.
- Confusing this cell-level locking with file encryption; locking controls editing, not whether the file opens.
Frequently asked questions
Why can I still edit a "locked" cell?
Because the sheet is not protected yet. The Locked attribute is dormant until you turn on Review ▸ Protect Sheet, which is what actually enforces it.
How do I lock only the formula cells and leave inputs open?
Unlock the input cells (Format Cells ▸ Protection ▸ uncheck Locked) while leaving the formulas Locked, then Protect Sheet — only the still-locked formulas become read-only.
Do I have to set a password to lock cells?
No. Protect Sheet works without a password; a password simply stops others from unprotecting the sheet and undoing your locks.
Other ways people ask this
People reach this page typing “lock certain cells in excel”, “how do i lock certain cells in excel”, “how do you lock certain cells in excel” and “how to print certain cells in excel”, among other phrasings; whichever wording you used, the fix above is the one you want.
Why do people search for this in so many different ways?
Because the same task has many names. “lock certain cells in excel”, “how do i lock certain cells in excel”, “how do you lock certain cells in excel” all point at the one operation explained on this page, which is why they all lead here.