BuildQuill
Math Symbols
√

Square Root Symbol

U+221A

The square root symbol, called a radical, shows the value that multiplied by itself gives the number underneath it.

Copy & encode

Character
√
Unicode codepoint
U+221A
HTML named entity
√
HTML decimal entity
√
HTML hex entity
√
CSS escape
\221A
JavaScript escape
\u221A

Meaning and usage

It is used in math equations and formulas, for example √9 equals 3, and appears often in geometry, physics, and engineering calculations.

Frequently Asked Questions

What is the HTML entity for the square root symbol?
Use √ or √.
Does √ always mean square root?
By itself yes, though a small number before it (like a cube root) changes which root it represents.