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Aug 08, 2026
HTML Entity Detail
HTML Entity - Radical Sign ("square Root")
Radical Sign ("square Root") is a mathematical operators, comparison symbols, and notation characters. This HTML entity enables web developers to display this character reliably across all browsers without encoding issues.
Symbol preview
√
Unicode
U+221A
HTML entity
√
CSS code
\221A
Usage Examples
Use this HTML entity in mathematical expressions and equations. For example, ≠ for not equal, ≤ for less than or equal, ∞ for infinity.
Related Entities
Common Mistakes
⚠️
Mistake: Using sqrt() or the word "root" instead of the √ symbol
Fix: Use √ (√) for square root in mathematical text. The sqrt() notation is programming-specific.
⚠️
Mistake: Forgetting the vinculum (overline) for grouped radicands
Fix: In proper mathematical notation, the square root symbol extends with an overline covering the entire radicand. Simply using √x is acceptable for simple cases.
Radical Sign ("square Root")
Select any code to highlight it before copying.
Category: Math Symbol
| Unicode | U+221A |
|---|---|
| Hex Code | √ |
| HTML Code | √ |
| HTML Entity | √ |
| CSS Code | \221A |
| Windows Shortcut | |
| Mac Shortcut | ⌥V |
HTML code example
CSS code example
Last updated: 17 Aug 2026
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