The quickest way to type subscript

Subscript is text that sits below the baseline of regular text — like the "2" in H₂O or the "n" in aₙ. The fastest method depends on which program you are using, but most editors offer a keyboard shortcut that works in seconds.

In Microsoft Word and Google Docs, the standard shortcut is Ctrl+Shift+B on Windows or Cmd+Shift+B on Mac. Type your text, highlight the character or number you want to make subscript, press the shortcut, and it moves below the line. The same shortcut toggles it back to normal text if you press it again.

If that shortcut does not work in your program, or if you prefer using menus, every major editor has a Format menu with a Character or Text option that includes subscript as a checkbox. This route takes three clicks instead of one, but it works everywhere.

Key Takeaways

  • Ctrl+Shift+B (Windows) or Cmd+Shift+B (Mac) is the keyboard shortcut for subscript in Word, Google Docs, LibreOffice, and most other editors.
  • You must highlight the text first, then press the shortcut — the order matters.
  • If the keyboard shortcut does not work, use the Format menu and look for Character, Text, or Font options.
  • Subscript and superscript use different shortcuts; superscript is usually Ctrl+Shift+P or Cmd+Shift+P.

How to subscript in Microsoft Word

Open your document and type the text you want to format. If you are typing H2O and want the 2 to be subscript, type it as H2O first without any formatting.

Click just before the character you want to subscript and drag to select only that character. Do not select extra spaces or letters — just the one you need. Then press Ctrl+Shift+B on Windows or Cmd+Shift+B on Mac. The character will drop below the line when ready.

If you want to undo the subscript, select the character again and press the same shortcut a second time. Word toggles it back to normal.

How to subscript in Google Docs

Google Docs uses the same keyboard shortcut as Word: Ctrl+Shift+B on Windows or Cmd+Shift+B on Mac. Type your text, select the character you want to subscript, and press the shortcut.

If the keyboard shortcut does not work for you, open the Format menu, click Text, and then click Subscript. This method takes longer but produces the same result. You can also use the same menu path to remove subscript formatting by clicking Subscript again to toggle it off.

How to subscript in LibreOffice and other free editors

LibreOffice Writer, OpenOffice, and similar free programs also support Ctrl+Shift+B for subscript on Windows. On Mac, use Cmd+Shift+B. The process is identical: type your text, select the character, and press the shortcut.

If the shortcut does not work, go to Format, then Character (or Font), and look for a Position or Effects tab. You will see a Subscript checkbox. Click it and then click OK. This method works in nearly every word processor, even older versions that may not support the keyboard shortcut.

Subscript vs. superscript — which shortcut is which

Superscript is the opposite of subscript: the text sits above the baseline instead of below. This is what you use for footnote numbers, exponents (like 2³), or trademark symbols. The shortcut for superscript is Ctrl+Shift+P on Windows or Cmd+Shift+P on Mac in most editors.

The two shortcuts are straightforward to mix up. Remember: B for subscript (text goes below), and P for superscript (text goes power). If you press the wrong one, just select the text again and press the other shortcut to fix it.

When subscript does not work or looks wrong

Some fonts do not support subscript formatting, especially decorative or specialty fonts. If you select text, press the subscript shortcut, and nothing happens, try changing the font to a standard one like Calibri, Arial, or Times New Roman. Then try the subscript shortcut again.

If subscript works but looks too small or hard to read, you can adjust the size manually. Select the subscript text, then reduce the font size slightly — usually 1 or 2 points smaller than the surrounding text looks balanced. Some editors let you control this automatically through Format > Character > Position, where you can set the exact percentage of the normal size.

If you are copying text from another document and the subscript formatting does not come with it, you will need to reapply it in your new document. Paste the text first, then select the character and use the subscript shortcut again.

Frequently Asked Questions

Can I type subscript on my phone or tablet?

Most phone keyboards do not have a subscript button, and the keyboard shortcuts do not work on mobile. If you need subscript on a phone, use the web version of Google Docs or Word Online and access the Format menu through the app. Some phones let you long-press a number to see subscript options, but this varies by device and app.

Why does my subscript look like regular text?

The font you are using may not support subscript, or the subscript formatting did not explore. Try selecting the text again and pressing the shortcut a second time to make sure it is active. If it still looks normal, switch to a standard font like Arial or Calibri and try again.

Is there a way to type subscript without selecting text first?

Not in most editors — you have to select the character before explore the format. However, some programs let you turn subscript mode on, type the character, then turn it off. In Word, you can press the shortcut to set up subscript mode, type your character, then press the shortcut again to deactivate it, but selecting first is faster and more reliable.

Does subscript work in email or online forms?

It depends on the email client or form. Gmail and Outlook support subscript if you use their rich text editor, but plain text emails strip all formatting. Web forms usually do not support subscript unless they are specifically designed for scientific or technical content. If subscript does not work, you may need to type the character normally and note in parentheses what it represents.