∜

Fourth Root Symbol (∜)

Copy and paste the fourth root ∜ with one click

Unicode Character

∜

Unicode Hex

U+221C

HTML Entity

∜

Decimal Code

8732

About the Fourth Root Symbol

Last reviewed on October 31, 2026

∜ is the radical sign with a small 4 in its crook, meaning the fourth root. For example ∜16 = 2. It is a rare precomposed sign, and many documents write the index as a small raised 4 instead.

Its official Unicode name is Fourth Root. Browse the Mathematical Symbols page for related characters.

How to Type Fourth Root on a Keyboard

Windows: Type 221C then press Alt+X in Word; in other apps, copy ∜ from this page and paste it. It has no classic Alt code

Mac: Press Ctrl+Cmd+Space to open the Character Viewer, then search for the symbol by name

Microsoft Word: Type 221C then press Alt+X

Phone & tablet: Copying ∜ from this page is fastest — see our mobile typing guide

Fourth Root Code for HTML, CSS & JavaScript

HTML: ∜

CSS: content: '\221C';

JavaScript: '\u221C'

Unicode: U+221C

Frequently Asked Questions

How do I type fourth root ∜ on Windows?

Type 221C then press Alt+X in Word; in other apps, copy ∜ from this page and paste it. It has no classic Alt code. You can also copy ∜ straight from this page.

How do I type ∜ on a Mac?

Press Ctrl+Cmd+Space to open the Character Viewer, then search for the symbol by name.

What is the Unicode and HTML code for fourth root?

It is Unicode code point U+221C, named Fourth Root. In HTML, use ∜.