How to Type the Square Root Symbol (√)
Fastest method: Alt+251 on Windows (with Num Lock on). On Mac, copy the symbol directly below.
Square Root
U+221A
Windows (Alt code)
Alt+251
Word (anywhere)
221A, Alt+X
Unicode code point
U+221A
HTML entity
√
FAQ
How do I type the square root symbol (√) on Windows?
Turn on Num Lock, hold the Alt key, then type 251 on the numeric keypad. Release Alt and the √ symbol appears.
How do I type the square root symbol (√) on Mac?
There's no dedicated Option shortcut. Open Character Viewer with Ctrl+Cmd+Space, search for "Square Root", or copy the symbol above directly.
How do I insert the square root symbol (√) in Word or Google Docs?
In Word, type 221A then immediately press Alt+X — the code turns into √. In Google Docs, use the Mac or Windows shortcut above, or go to Insert > Special characters.
What is the HTML code for the square root symbol (√)?
The HTML entity is √ (or the numeric code √) — use it directly in your source code.