To type √: HTML √ · CSS \221a · or copy it from the key above.
01 Every way to type it
Every input method verified against an authoritative source — no invented Alt codes.
| Platform | Input | |
|---|---|---|
| HTML entity | √ | |
| CSS content | \221a | |
| Linux (IBus) | Ctrl+Shift+U then 221a |
02 Type it yourself
Paste or type here to check it renders in your own font before you use it.
03 Technical details
Encoding and reference data for Square Root, derived straight from the Unicode standard.
| Code point | U+221A |
| Decimal | 8,730 |
| Category | Symbol, math |
| Unicode version | 1.1 |
| UTF-8 | E2 88 9A |
| UTF-16 | 221A |
| HTML entity | √ √ |
| CSS | \221a |
| URL-encoded | %E2%88%9A |
04 FAQ
What is √?
√ is “Square Root”, Unicode character U+221A. Tap the key near the top of this page to copy it, then paste it anywhere that accepts Unicode text.
How do I type √?
Every method — Windows, Mac, HTML and CSS — is listed in the table above. The quickest option is to tap the key above to copy √ straight to your clipboard.
What is the HTML or CSS code for √?
In HTML use √ (decimal) or √ (hexadecimal). In a CSS content property use \221a.
05 Related & confusable characters
Programmatically linked from the Unicode data.
06 People also type
Guides that cover this character alongside others like it.