| Character | √ |
| Name | Square Root |
| Unicode Code Point | U+221A |
| Decimal Value | 8730 |
| Hex Value | 0x221A |
| Category | Math Operators |
| Windows Alt Code | Alt+251 |
| Word Alt+X Code | 221A + Alt+X |
| Mac Shortcut | Option+V |
| HTML Entity | √ |
| HTML Code (Dec / Hex) | √ / √ |
| CSS Content Code | content: "\221A"; |
| JavaScript Unicode Escape | "\u{221A}" |
Square Root is a formal mathematical operator or relation symbol used in academic and technical writing — algebra, calculus, logic, or set theory — to express a precise mathematical relationship concisely.
Unicode block: Mathematical Operators (U+2200–U+22FF). This large block standardizes the symbols used across algebra, calculus, logic, and set theory, replacing the inconsistent, often hand-drawn notation used before digital typesetting.
At Unicode code point U+221A (decimal 8730), Square Root is the 27th of 256 characters cataloged in this category on How To Type Any Symbol. In terms of typing methods, it is one of the characters in this block with both a documented Windows Alt code and a Mac keyboard shortcut, making it typeable without copy-paste on either platform. Regardless of platform, clicking the copy button above places the exact character on your clipboard, ready to paste into any application that accepts Unicode text.
💡 Good to know: Screen readers often mispronounce or skip mathematical symbols — accessible math content typically needs MathML or alt-text descriptions alongside the raw character.
Hold Alt and type 251 on the numeric keypad.
Press Option+V.
Click the symbol above to copy it, then paste anywhere — works on every device and OS.
Use the entity √ in your HTML.
On Windows, hold Alt and type 251 on the numeric keypad (with Num Lock on), or copy √ from this page and paste it with Ctrl+V.
On Mac, press Option+V, or copy √ from this page and paste it with Command+V.
Square Root (√) is Unicode U+221A, decimal 8730.
Use the HTML entity √, or the numeric code √ (hex √).