How to Unhide All Columns in Excel

What this does

Hiding a column tucks it out of sight while every value and formula in it keeps working — useful for helper columns or sensitive figures you do not want on screen. You select columns by their letters, right-click and pick Hide. Most columns unhide by selecting the columns either side of the gap and choosing Unhide. Column A is the awkward exception: there is no column to its left to include in the selection, so the standard trick fails and you reach it through the Name Box instead. 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. For “unhide all columns in excel”, the reliable version is a short checking loop, not just the first command that appears to work. Run it on a deliberately small range first, watch how the affected columns change, and only then apply the same setup to the full sheet. 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. That is what makes a layout choice that keeps the sheet readable and sortable useful in real work: repeatable, auditable, and not dependent on memory or luck.

A worked example

A sheet has working columns C, D and E you want hidden. Click header C, drag to E to select all three, right-click and choose Hide — columns C to E disappear and the letters run B, F. The special case is a hidden column A: select B and the gap and Unhide does nothing, so instead type A1 into the Name Box (top-left, beside the formula bar) and press Enter to jump into the hidden column, then Home ▸ Format ▸ Hide & Unhide ▸ Unhide Columns to bring A back. Hide columns to keep helper calculations, ID codes or sensitive figures off the screen and out of a print-out without deleting them. Knowing the Name Box route to recover column A turns the one genuinely fiddly case into a two-step fix. A practical tip: try it on a copy of the sheet or a handful of sample rows first and check the result before you apply it to the real data. That one habit catches almost every surprise while it is still cheap to reverse.

In Google Sheets

This is a command rather than a formula, so there is no syntax to carry over. Google Sheets arranges its commands in menus across the top instead of a ribbon, names some of them differently and does not have every Excel command — look for the equivalent in the Sheets menus or its help before assuming the steps match. Nothing on this page is behind a login or a download: the exact answer is at the top, and the detail below it is there for when you need it. That is the whole promise here — the answer first, and just enough context to make it stick. Treat “unhide all columns in excel” as a routine rather than a one-off. Once you know which setting or command controls it, the same few steps handle every workbook where it comes up in Excel, and you can explain them to a colleague in a sentence.

Common mistakes

• Selecting cells rather than whole column letters, which greys out Hide or hides the wrong range.
• Trying to unhide column A by selecting around it — nothing sits to its left, so use the Name Box trick instead.
• Assuming a hidden column is deleted; the data is intact and any formula pointing at it still calculates.
• Hiding a column other code or a chart depends on, which can confuse references that expected it visible.

Frequently asked questions