The quickest way to add subscript in Word

To make text subscript in Microsoft Word, select the letters or numbers you want to shrink and lower, then press Ctrl+= (Ctrl and the equals sign) on your keyboard. The text will immediately drop below the line and become smaller. Press the same keys again to turn subscript off.

If you are using a Mac, press Cmd+= (Command and equals) instead. This works in Word 2016 and later on both Windows and Mac.

You can also use the ribbon menu if you prefer not to memorize the keyboard shortcut. On the Home tab, look for the subscript button in the Font group — it looks like an "x" with a small number below it. Click it to toggle subscript on and off.

Key Takeaways

  • The keyboard shortcut Ctrl+= (Windows) or Cmd+= (Mac) is the fastest way to apply subscript formatting to selected text.
  • You can also find the subscript button on the Home tab in the Font group, marked with an "x" and a small number.
  • Subscript works on any text you select — letters, numbers, or symbols — and applies instantly without opening a dialog box.
  • The same shortcut turns subscript off, so you can toggle it on and off as many times as you need in a single document.

Using the Format menu if the ribbon is hidden

If your ribbon is minimized or you cannot see the Font group, you can reach subscript through the menu. Click Format in the top menu bar, then select Text, then Subscript. This route takes longer but works the same way.

Some versions of Word also let you right-click selected text and choose Font from the context menu. In the Font dialog box, check the Subscript checkbox under Effects, then click OK.

Common uses for subscript in documents

Subscript is most often used in scientific and mathematical writing. Chemical formulas like H₂O or CO₂ require subscript numbers to show how many atoms are in each molecule. In mathematics, subscript appears in sequences (like x₁, x₂, x₃) and in footnote or endnote markers.

You may also see subscript in legal documents for numbered references, in medical writing for dosages, or in any technical field where notation matters. Word treats subscript as a character-level format, so you can mix regular text and subscript in the same word or sentence without affecting anything else.

Subscript versus superscript

Do not confuse subscript with superscript, which raises text above the line instead of lowering it below. Superscript is used for exponents (like 2³ for "two to the third power"), footnote numbers, and trademark symbols. In Word, superscript uses the keyboard shortcut Ctrl+Shift+= (Windows) or Cmd+Shift+= (Mac).

Both formats shrink the text size automatically. If you need both subscript and superscript in the same document, Word keeps them separate — applying one does not affect the other.

Fixing subscript that does not look right

If subscript text looks too small or too large, you can adjust the font size before or after applying the subscript format. Select the subscript text, then change the font size in the toolbar or use Ctrl+] to make it larger or Ctrl+[ to make it smaller. Word will keep the subscript position even as you resize.

If subscript text is not lowering enough or is lowering too much, this is usually a font issue. Some fonts handle subscript positioning differently than others. Try switching to a standard font like Calibri or Times New Roman to see if the positioning improves. If you are working with a specialized font, check whether the font designer included subscript positioning information.

Copying and pasting subscript text

When you copy text that contains subscript and paste it into another part of your document, the subscript formatting comes along automatically. This works within Word and also when pasting into other Microsoft Office programs like Excel or PowerPoint.

If you paste subscript text into a program outside Office — like Google Docs, a web form, or plain text email — the subscript formatting may not survive. The text itself will paste, but it will return to normal size and position. If you need subscript in those places, you may need to reapply the formatting or use special characters instead.

Frequently Asked Questions

Can I make multiple words subscript at once?

Yes. Select all the text you want to make subscript — whether it is a single character, a word, or several words — then press Ctrl+= (or Cmd+= on Mac). Word will apply subscript to everything you selected as a group.

Does subscript work in all fonts?

Subscript works in all fonts, but the positioning and size may vary slightly. Standard fonts like Calibri, Arial, and Times New Roman handle subscript consistently. Decorative or specialty fonts may position subscript differently or make it harder to read.

What if the keyboard shortcut does not work?

Make sure you are pressing the equals sign on the main keyboard, not the plus sign. On some keyboards, Ctrl+= and Ctrl++ are different keys. If it still does not work, use the Home tab ribbon button or the Format menu instead. The keyboard shortcut may also be disabled if your keyboard layout is set to a non-English language.

Can I undo subscript formatting?

Yes. Select the subscript text and press Ctrl+= again (or Cmd+= on Mac) to turn it off. You can also press Ctrl+Z to undo the last action, which will remove the subscript formatting and restore the text to normal.