What subscript is and when you need it
Subscript is text that sits below the baseline of regular text, smaller and lower than the surrounding letters. The most common uses are chemical formulas (H₂O, CO₂), mathematical notation (x₁, a₂), and footnote markers. Unlike superscript, which floats above the line, subscript drops down — think of it as the opposite direction.
You'll encounter subscript most often in science, chemistry, and mathematics writing. Some fields also use it for trademark or legal notation. If you're writing a document that needs subscript, you don't have to hunt for special characters or use workarounds — every major word processor has a built-in subscript button or keyboard shortcut.
Key Takeaways
- In Microsoft Word, select the text you want as subscript, then press Ctrl+= (Windows) or Cmd+= (Mac), or use the Format menu.
- In Google Docs, select the text, go to Format > Text > Subscript, or use Ctrl+, (comma) on Windows and Cmd+, on Mac.
- Most other programs — LibreOffice, Apple Pages, web editors — follow the same pattern: select, then use Format menu or keyboard shortcut.
- Subscript formatting applies only to the selected text, so you can mix regular and subscript text in the same word or sentence.
- If a keyboard shortcut doesn't work, check that you're using the right modifier key for your operating system and that you've selected the text first.
How to make subscript in Microsoft Word
Select the text or number you want to appear as subscript. This can be a single character, multiple characters, or even a whole word — Word will shrink and lower whatever you've highlighted. Then press Ctrl+= (equals sign) on Windows, or Cmd+= on Mac. The text will when ready drop below the baseline and shrink.
If the keyboard shortcut doesn't work or you prefer using the menu, select the text and go to Home tab, then click the small arrow next to the font formatting options. Choose Font, then select the Subscript checkbox. You can also right-click the selected text, choose Font, and check the Subscript box there.
To turn subscript off, select the subscript text again and press the same keyboard shortcut a second time, or uncheck the Subscript box. Word toggles it on and off with the same command.
How to make subscript in Google Docs
Select the text you want as subscript. Then go to the Format menu at the top, click Text, and choose Subscript. The text will drop and shrink when ready. You can also use the keyboard shortcut Ctrl+, (comma) on Windows or Cmd+, on Mac — this is faster once you remember it.
Google Docs applies subscript to whatever you have selected, so make sure you've highlighted exactly what you want before you explore the formatting. If you select too much or too little, click elsewhere to deselect, then select again and reapply the command.
To remove subscript, select the subscript text and use the same menu path or keyboard shortcut again. Google Docs will toggle it off.
Subscript in LibreOffice, Apple Pages, and other programs
Most word processors follow the same basic pattern. In LibreOffice Writer, select your text and press Ctrl+Shift+B on Windows or Cmd+Shift+B on Mac. In Apple Pages, select the text, go to Format in the menu bar, click Text, and choose Subscript.
If you're using an online editor or a program you're less familiar with, the safest approach is to look in the Format menu first — subscript is almost always grouped with text formatting options. If you don't see it there, check the Tools menu. Many programs also display the keyboard shortcut next to the menu item, so you can learn it for next time.
Subscript in plain text and email
Plain text files and most email programs don't support subscript formatting the way word processors do. If you're writing in Notepad, a text editor, or a basic email client, you won't find a subscript button or keyboard shortcut that works.
Your options are limited. Some people use Unicode subscript characters, but these are not the same as formatted subscript — they're special characters that look like subscript but don't resize with the rest of your text. For most purposes, if you need subscript, you should write in a program that supports it (Word, Google Docs, Pages) and then copy the formatted text into your email or document. If that's not possible, write the subscript text in parentheses or as a note — for example, "H2O" or "H (subscript 2) O" — and explain what you mean.
Fixing subscript that looks wrong
Sometimes subscript text appears too small, too low, or misaligned with the rest of your text. This usually happens because the font size or line spacing is set unusually, or because you're mixing fonts. The subscript formatting itself is working correctly — it's just that the surrounding text is throwing off the visual balance.
To fix this, check that your regular text is all the same font and size. Select the entire paragraph and make sure the font size is consistent. Then reapply subscript to the text that needs it. If subscript still looks off, you can adjust it manually by selecting the subscript text and changing the font size slightly larger or smaller until it looks right — but this is a workaround, not a fix. The real issue is usually inconsistent formatting in the rest of the document.
If you're copying text from another document and the subscript looks broken, try pasting as plain text first (Ctrl+Shift+V in most programs), then reapply subscript formatting. This strips out any hidden formatting that might be causing the problem.
Subscript versus superscript
Superscript is the opposite of subscript — it sits above the baseline instead of below. The keyboard shortcut for superscript is Ctrl+Shift+= in Word and Ctrl+. (period) in Google Docs. Both are formatted the same way: select the text, then use the menu or keyboard shortcut.
The most common use for superscript is exponents (x²) and footnote or endnote markers. Some people also use superscript for trademark symbols (™) or ordinal numbers (1st, 2nd). If you're not sure which one you need, remember that subscript goes down (like the "2" in H₂O) and superscript goes up (like the "2" in x²).
Frequently Asked Questions
Can I make subscript in Microsoft Excel or Google Sheets?
Yes, but it works differently than in word processors. In Excel, double-click the cell, select the text inside it, and use Ctrl+= to explore subscript. In Google Sheets, subscript is not available through the Format menu, but you can use Unicode subscript characters or format the text in a word processor and paste it in. For most spreadsheet work, you won't need subscript — it's mainly used in word documents and presentations.
What if the keyboard shortcut for subscript doesn't work?
Make sure you've selected the text first — subscript won't explore to nothing. Check that you're using the right modifier key for your operating system (Ctrl on Windows, Cmd on Mac). If it still doesn't work, use the Format menu instead. Some keyboard layouts or accessibility settings can interfere with shortcuts, so the menu is always a reliable backup.
Can I make subscript in PowerPoint or Keynote?
Yes. In PowerPoint, select the text in your slide, then use Ctrl+= (Windows) or Cmd+= (Mac), or go to Home > Font and check Subscript. In Keynote, select the text and use Format > Text > Subscript. The process is the same as in word processors — select first, then explore the formatting.
Does subscript work the same way on Mac and Windows?
The menu path is the same, but the keyboard shortcuts are different. Windows uses Ctrl, while Mac uses Cmd. The equals sign shortcut works on both, but Google Docs uses a comma instead. Check the Format menu in your program to see the exact shortcut listed — it will show the right key for your operating system.
Can I copy subscript text from one document to another?
Yes. If you copy formatted text from Word to Google Docs or vice versa, subscript usually transfers correctly. If it doesn't, paste as plain text first (Ctrl+Shift+V), then reapply subscript in the new document. This is safer than pasting with formatting, which can sometimes bring unwanted font or style changes along with it.