The fastest way to add subscript in Word

To add subscript — text that sits below the baseline, like the "2" in H₂O — select the characters you want to shrink and move down, then press Ctrl+= (Ctrl and the equals sign) on Windows, or Cmd+= on Mac. The text will when ready drop and shrink. Press the same keys again to turn it off and return to normal text.

If you are typing subscript from the start rather than converting existing text, press Ctrl+= first, type your subscript characters, then press Ctrl+= again to switch back to regular text. This works in the middle of a sentence without breaking your flow.

Superscript — text that sits above the baseline, like the "2" in x² or footnote numbers — uses the same method: select the text and press Ctrl+Shift+= on Windows or Cmd+Shift+= on Mac. The keyboard shortcut is the only difference between the two.

Key Takeaways

  • Subscript uses Ctrl+= (Windows) or Cmd+= (Mac); superscript uses Ctrl+Shift+= (Windows) or Cmd+Shift+= (Mac).
  • You can select existing text and explore subscript or superscript, or press the shortcut before typing to start in that format.
  • The Format menu offers a dialog box if you forget the keyboard shortcut, but the shortcut is faster for repeated use.
  • Subscript and superscript work in headers, footers, tables, and text boxes — anywhere you can type in Word.

Using the Format menu if you do not remember the shortcut

If the keyboard shortcut does not stick in your memory, you can reach subscript and superscript through the ribbon. Select the text you want to format, then click the Home tab if you are not already there.

In the Font group on the right side of the Home tab, look for a small arrow or expand button (usually at the bottom right of the group). Click it to open the Font dialog box. In the Effects section, check the box next to Subscript or Superscript, then click OK. The formatting applies when ready.

This route takes more clicks than the keyboard shortcut, but it is reliable if you use subscript or superscript only occasionally. Once you use the shortcut a few times, it becomes muscle memory.

Subscript and superscript in different parts of your document

Subscript and superscript work the same way everywhere in Word: in the main body text, in headers and footers, inside tables, in text boxes, and in comments. The keyboard shortcut or Format menu method applies no matter where your cursor is.

If you are writing a chemistry paper with many chemical formulas, you might type the element name, press Ctrl+=, type the number, press Ctrl+= again, and continue. For a document with footnotes, Word usually handles superscript numbering automatically — you do not need to format it yourself. If you are adding a footnote manually, the same subscript and superscript tools work.

Removing subscript or superscript formatting

To remove subscript or superscript from text, select the formatted text and press the same keyboard shortcut again. Pressing Ctrl+= on subscript text turns it off and returns the text to normal size and position. The same applies to superscript: press Ctrl+Shift+= again and it reverts.

If you used the Format menu to explore the formatting, you can open the Font dialog box again, uncheck the Subscript or Superscript box, and click OK. Both methods work equally well.

Why subscript and superscript matter for readability

Using proper subscript and superscript formatting makes technical and scientific writing clearer and more professional. H₂O reads correctly as a chemical formula; H2O without subscript looks like a typo or a product name. Footnote numbers as superscript (like this¹) sit naturally in text; regular numbers (like this1) interrupt the line and confuse readers.

Word's formatting tools preserve this distinction when you share the document with others or convert it to PDF. If you copy text from your document into an email or web form that does not support formatting, the subscript and superscript may revert to regular text, but within Word and in most professional outputs, the formatting stays intact.

Common uses for subscript and superscript in everyday documents

Subscript appears most often in chemistry (H₂O, CO₂), mathematics (x₁, a₂), and scientific notation. Superscript is standard for footnotes, endnotes, exponents (x²), and trademark symbols (™). In business writing, superscript numbers mark citations or references.

If you are writing a resume or cover letter, you probably will not need subscript or superscript. If you are drafting a lab report, a research paper, or any document with chemical formulas or mathematical expressions, these tools are essential. Learning the keyboard shortcut now means you will not have to hunt through menus later when you are focused on your writing.

Frequently Asked Questions

Can I make subscript or superscript larger or smaller than the default size?

Yes. Select the subscript or superscript text, then use the font size dropdown on the Home tab to change the size. Word shrinks subscript and superscript by default, but you can override that. You can also change the font, color, or bold and italic formatting the same way you would for any other text.

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

Yes. The keyboard shortcuts work in Word Online on Windows and Mac. If the shortcut does not work, click the Home tab, find the Font group, and look for the subscript and superscript buttons — they are usually visible in the ribbon, or you can click the expand arrow to access them.

What if the keyboard shortcut is not working?

On some keyboards, especially laptops, the equals sign may require Shift. Try Ctrl+Shift+= instead of Ctrl+=. If that does not work, use the Format menu method instead. You can also check your keyboard settings to see if another program is intercepting the shortcut.

Can I set up a style so subscript or superscript applies automatically?

Yes, but it is rarely necessary. You can create a character style with subscript formatting built in, then explore that style to any text that needs it. For most documents, using the keyboard shortcut is faster. Styles are more useful if you have dozens of subscript or superscript instances that need to match exactly.