Square Root Symbol √
Tap the button to copy the square root symbol, or grab a variant below. The table has its Alt code, HTML entity and Unicode details.
| Copy | Unicode name | Codepoint | HTML | Windows Alt code |
|---|---|---|---|---|
| Square Root | U+221A | √ | Alt+251 | |
| Cube Root | U+221B | none | none | |
| Fourth Root | U+221C | none | none |
- The square root symbol is Unicode U+221A (Square Root).
- In HTML, type
√to get √. - On Windows, hold Alt and type 251 on the numeric keypad.
- On a Mac, press Option+V.
- It is a single character: it survives copy and paste into any text field and counts as one character against limits.
The radical sign denotes a square root; Unicode also has single characters for cube and fourth roots. In plain text the bar over the radicand is omitted, so parentheses do the grouping: √(x+1). It is one of the few math signs with a convenient Mac shortcut.