How to Write Superscript and Subscript in Microsoft Word

Whether you're typing a chemical formula like H₂O, a mathematical expression like x², a footnote reference, or a trademark symbol like ™, knowing how to format superscript and subscript text in Word is a genuinely useful skill. The good news: Word gives you several ways to do it, and once you know all the options, you can pick the one that fits your workflow.

What Are Superscript and Subscript?

Superscript raises text above the baseline and reduces its size — used for exponents (x²), ordinal numbers (1st, 2nd), footnote markers, and trademark symbols.

Subscript drops text below the baseline — used primarily in chemical formulas (CO₂, H₂SO₄), mathematical notation, and scientific writing.

Both are purely typographic — they don't change the underlying character, just its vertical position and scale.

Method 1: The Ribbon Buttons (Quickest for Occasional Use)

The most visible route is through the Home tab in the ribbon.

1. Select the text you want to format (or position your cursor before typing).
2. Go to Home → Font group.
3. Click the X² button for superscript, or the X₂ button for subscript.
4. Type your text if you haven't already, then click the button again to toggle the formatting off.

These buttons sit right next to Bold, Italic, and Underline, so they're easy to find once you know where to look. Clicking either button a second time returns the text to normal baseline formatting.

Method 2: Keyboard Shortcuts (Fastest for Regular Use) ⌨️

If you use superscript or subscript frequently, keyboard shortcuts will save you real time.

The logic to remember: Ctrl + = (equals sign) for subscript, and adding Shift bumps it up to superscript. On Mac, the same pattern applies with Cmd instead.

Like the ribbon buttons, these shortcuts toggle — press once to enable, type, then press again to switch back to normal text.

Method 3: The Font Dialog Box (Most Control)

For precise formatting, especially when you're already in the Font settings, you can apply superscript or subscript through the dialog box.

1. Select the target text.
2. Open the Font dialog: Home → Font group → small arrow in the bottom-right corner (or press Ctrl + D on Windows / Cmd + D on Mac).
3. Under Effects, check the Superscript or Subscript box.
4. Click OK.

This method is useful when you're adjusting multiple character formatting properties at once — say, changing font size and applying superscript simultaneously.

Method 4: AutoCorrect and AutoFormat (Automatic for Common Cases)

Word has built-in AutoFormat rules that handle some superscript cases automatically without any manual steps.

Ordinal numbers like 1st, 2nd, 3rd are often auto-formatted to 1^st^, 2^nd^, 3^rd^ as you type — depending on your AutoCorrect settings. Similarly, typing (c), (r), or (tm) can auto-convert to ©, ®, or ™.

To check or adjust this behavior:

• Go to File → Options → Proofing → AutoCorrect Options → AutoFormat As You Type.
• Look for Ordinal numbers (1st) with superscript and toggle accordingly.

This is convenient for common symbols but won't handle scientific notation or custom formulas — for those, manual methods are still required.

Method 5: The Symbol or Equation Editor (For Complex Notation) 🔢

If you're working with complex mathematical expressions, Word's built-in Equation Editor is a better tool than raw superscript/subscript formatting.

• Go to Insert → Equation (or press Alt + = on Windows).
• The equation editor provides a structured environment where superscripts, subscripts, fractions, and radicals behave as proper mathematical objects — not just visually shifted characters.

This matters when you're writing content that will be read by screen readers, converted to other formats, or pasted into systems that parse mathematical notation. Equation-formatted expressions carry semantic meaning; manually styled text does not.

Where Things Get More Variable

The experience of using superscript and subscript in Word doesn't change dramatically between versions, but a few factors affect which approach works best for you:

• How often you use it. Occasional users will be fine with ribbon buttons. Anyone writing chemistry lab reports or mathematical papers will want keyboard shortcuts memorized.
• Your Word version. The Equation Editor has improved significantly in newer versions of Word (2016, 2019, Microsoft 365). Older versions may have a more limited interface.
• Output format. If your document will be exported to PDF, HTML, or another format, check how superscript/subscript renders in the target format — some conversions handle it cleanly, others flatten or lose the formatting.
• Accessibility. For documents where accessibility compliance matters, equation-formatted content is more robust than visually formatted character shifts.
• Collaboration. If the document will be edited by others, simple formatting (ribbon/shortcut method) works universally. Complex equations require that collaborators also have a compatible Word version.

Whether you need a quick x² in a casual document or consistently formatted chemical equations in a technical report, the right method depends on how that document will be used, shared, and read — and that's a context only you can fully see from where you're sitting.