How to Use Subscript in Excel

What this does

Superscript raises characters above the baseline (m², 2nd, x³) and subscript drops them below it (H₂O, CO₂). Both are font effects applied to a selection of characters INSIDE the cell, which is why you have to enter edit mode first: applying the effect with the cell merely selected raises or lowers everything in it. 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. Treat “use subscript in excel” as a small repeatable workflow rather than a one-off click you hope to remember next time. Use a small test block before the live file, so any surprise in the affected cells shows up while it is still harmless. 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 turns a workflow that saves repeating the same clicks every week into a method you can reuse, explain, and defend when the workbook leaves your screen.

A worked example

Type m2 in A1, double-click the cell, drag over just the 2, press Ctrl+1, tick Superscript and press Enter — the cell reads m². To produce the same character from a formula instead, ="Area: "&B2&" m"&UNICHAR(178) returns Area: 24 m² without any font effect at all. Units, footnote markers and chemical formulae read as sloppy when they sit on the baseline, and the cheap fix — typing them as separate characters — is the one that breaks arithmetic. 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

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. Here is the takeaway for “use subscript 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

• Selecting the cell instead of the characters, which raises the whole entry including the part that should stay on the baseline.
• Formatting part of a numeric entry: the moment mixed formatting is applied the cell becomes text and stops being counted by SUM.
• Trying to superscript the result of a formula — the effect cannot apply to part of a calculated value, so use UNICHAR or CHAR to build the character instead.
• Assuming it survives a copy into another application; many editors drop the character-level effect on paste.

Frequently asked questions