The fastest way to add a subscript in Word

To add a subscript in Microsoft Word, select the text or number you want to make smaller and lower, then press Ctrl + = (on Windows) or Cmd + = (on Mac). The text will immediately drop below the baseline and shrink. To undo it, select the text again and press the same keys.

This keyboard shortcut works in any version of Word from the last decade and is faster than using the menu. If the shortcut does not work on your keyboard, your num lock or function keys may be interfering — try the menu method instead.

Subscript is useful for chemical formulas (H₂O), mathematical notation, and any text that needs to sit lower than the regular line. Once you apply it, the formatting stays with the text if you copy it elsewhere.

Key Takeaways

  • The keyboard shortcut Ctrl + = (Windows) or Cmd + = (Mac) instantly converts selected text to subscript without opening any menu.
  • The Format menu offers a Subscript option under Character or Text Effects if the keyboard shortcut does not work on your device.
  • Superscript uses Ctrl + Shift + = (Windows) or Cmd + Shift + = (Mac) and works the same way as subscript.
  • You can apply subscript or superscript before typing by activating it first, then typing, then turning it off.
  • Subscript and superscript do not change the actual text — they only change how it appears on screen and in print.

Using the Format menu if the keyboard shortcut does not work

If the keyboard shortcut does not activate subscript on your computer, open the Format menu at the top of Word and look for an option called Character, Text Effects, or Font. Click it to open a dialog box with formatting options.

In that dialog, find the Effects or Position section and check the box next to Subscript. Click OK. The selected text will drop below the baseline. This method takes longer than the keyboard shortcut but works on any device where the shortcut is blocked or reassigned.

On Mac, the Format menu path is Format > Character > Position, then select Subscript from the dropdown. On Windows, it is Format > Text > Effects or Format > Character depending on your Word version.

Applying subscript before you type

You do not have to select text after typing it. You can turn subscript on before you type, write the text you want subscripted, then turn subscript off to return to normal text.

Press Ctrl + = (or Cmd + =) to activate subscript mode. Type the text or numbers you want subscripted. Press Ctrl + = again to turn subscript off and return to regular text. This method is useful when you know in advance that certain text needs to be subscripted — for example, chemical formulas or footnote numbers.

This approach saves time because you avoid the extra step of selecting text after typing. It also prevents accidental formatting of surrounding text.

Superscript: the same process, one key different

Superscript (text that sits above the baseline and shrinks) uses the same process as subscript, with one change: press Ctrl + Shift + = (Windows) or Cmd + Shift + = (Mac) instead. Everything else works identically — you can use it on selected text, activate it before typing, or access it through the Format menu.

Superscript is commonly used for exponents, trademark symbols, and footnote references. The keyboard shortcut is the fastest method and works across all versions of Word. You can toggle superscript on and off the same way you do subscript.

Why subscript and superscript matter for certain documents

Subscript and superscript are not just formatting tricks — they are necessary for writing chemical formulas, mathematical equations, and academic citations correctly. H₂O looks wrong without the subscript 2. Using these tools ensures your document reads and prints the way it should.

The formatting stays with the text when you copy and paste it into other documents or email, so you do not have to reformat it later. If you send the document to someone else, they will see the subscript or superscript exactly as you created it. This consistency matters in scientific writing, technical documentation, and any formal work.

Removing subscript or superscript

To remove subscript or superscript from text, select the text and press the same keyboard shortcut you used to apply it. Pressing Ctrl + = again will toggle subscript off. The text will return to normal size and position on the baseline.

You can also select the text, open the Format menu, and uncheck the Subscript or Superscript box. Both methods work equally well. If you applied subscript before typing and want to remove it, select the subscripted text and press the shortcut once to turn it off.

Frequently Asked Questions

Does subscript work the same way in Word Online as it does in the desktop version?

Word Online has the same keyboard shortcuts, but they may not work if your browser or keyboard settings interfere. If the shortcut does not work, use the Format menu instead. The desktop version of Word is more reliable for frequent subscript and superscript use.

Can I make subscript text even smaller or change its color?

Yes. After applying subscript, you can select the text again and adjust the font size or color using the toolbar or Format menu. Subscript is just a position and size change — you can layer other formatting on top of it.

What if I need subscript in a table or header?

Subscript works anywhere in Word — tables, headers, footers, text boxes, and comments. Select the text and use the keyboard shortcut or Format menu the same way you would in regular body text.

Will subscript print correctly if I send my document to a printer?

Yes. Subscript and superscript are built into Word's formatting and will print exactly as they appear on your screen. The formatting is preserved in PDF, email, and most other file formats.