How to Add 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. Most people learn this as a sequence of clicks and forget it by next week; learning it as a pattern instead is what lets you apply it to the next, slightly different version of the problem without starting from scratch. That is the difference this page is trying to make. The difference between a quick fix and a sheet you can trust is the extra minute you spend validating “add subscript in excel”. Start on a copy or a tiny sample, keep the affected cells visible, and compare the result with the tool above 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

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. The aim was to get you unstuck fast and leave you a little more capable than a copy-paste would. The answer is at the top and the detail above shows why it holds — so the next time a colleague asks, you can answer without reaching for search. The short version of “add subscript in excel”: the answer is at the top of this page, and the sections above explain why each step matters, so a variation of the problem does not stump you. Try it once on a copy of a real file and the steps stick far better than re-reading them.

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