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Square root
U+221A · Mathematical Operators
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Meaning and uses
The square root sign, or radical, as in √9 = 3. It is used in maths notes, homework and calculator instructions.
Unicode details
√ is the Unicode character named SQUARE ROOT, code point U+221A, in the Mathematical Operators block. It was added in Unicode 1.1 in 1993, and Unicode classes it as a maths symbol (general category Sm).
It is not an emoji, so it keeps the colour and size of the text around it.
| Unicode name | SQUARE ROOT |
|---|---|
| Code point | U+221A |
| Block | Mathematical Operators |
| Added | Unicode 1.1 (1993) |
| UTF-8 bytes | E2 88 9A |
| UTF-16 | 221A |
| HTML | √ or √ |
Tap a code to copy it:
How to type √
- On any device, tap the copy button above, then paste with a long press on a phone, Ctrl+V on Windows or Cmd+V on a Mac.
- In Microsoft Word on Windows, type 221A and then press Alt+X to turn the code into √.
- On a Mac, press Control+Cmd+Space to open the Character Viewer, then search for “square root”.
- On Linux, most desktops accept Ctrl+Shift+U, then 221a, then Space or Enter.
- In HTML, use
√or√. In a CSScontentproperty, use"\221A".