U+221A
Square root√
Square root is a monochrome text character from the Unicode Mathematical Operators block, listed here under Math. Copy it with one click, or use the hex, octal, decimal and HTML entity codes below to embed it in web pages, code, and documents. It is often searched for as "radical".
Quick facts
- Unicode
- U+221A
- Decimal
- 8730
- Hex
- 0x221A
- Octal
- 0o21032
Unicode identity
| Format | Value | Copy |
|---|---|---|
| Code pointOfficial Unicode notation | U+221A | |
| Official nameUnicodeData.txt, Unicode 18.0.0 | SQUARE ROOT | |
| DecimalBase 10 | 8730 | |
| HexadecimalBase 16 | 0x221A | |
| OctalBase 8 | 0o21032 | |
| BinaryBase 2 | 0010001000011010 | |
| General categorySymbol, math | Sm | |
| Unicode blockU+2200–U+22FF | Mathematical Operators | |
| Plane | Basic Multilingual Plane (BMP, Plane 0) |
HTML & CSS
| Format | Value | Copy |
|---|---|---|
| HTML entity (decimal) | √ | |
| HTML entity (hex) | √ | |
| HTML entity (named) | √ | |
| CSS content escapeUse inside content: "…" | \221A | |
| URL encodedPercent-encoded UTF-8 | %E2%88%9A |
Programming languages
| Format | Value | Copy |
|---|---|---|
| JavaScript / TypeScript | \u221A | |
| JSONUTF-16 surrogate pairs | \u221A | |
| Python | \u221A | |
| Java / C# / Kotlin | \u221A |
Byte encodings
| Format | Value | Copy |
|---|---|---|
| UTF-83 bytes | E2 88 9A | |
| UTF-16 (BE) | 221A | |
| UTF-32 (BE) | 0000221A |
How to type Square root
Windows
Hold Alt and type +221A with the hex numeric keypad option enabled, or type 221A then press Alt+X in Word and most Office apps.
macOS
Enable the Unicode Hex Input keyboard, hold Option, and type 221A. Or open Character Viewer (Control+Command+Space) and search "Square root".
Linux
Press Ctrl+Shift+U, type 221a, then press Space or Enter in GTK apps. IBus and most terminals support the same sequence.
HTML, CSS & code
Paste the character directly, or use the escapes above: √ in HTML, \221A in CSS, and \u221A in JavaScript.
Official Unicode reference
- Character name
- SQUARE ROOT
- Block
- Mathematical Operators (U+2200–U+22FF)
- General category
- Sm — Symbol, math
Data from the Unicode Character Database, version 18.0.0. See the official code chart for the Mathematical Operators block: U2200.pdf (PDF, unicode.org).
Frequently asked questions
How do I copy the Square root symbol?
Click the Copy button at the top of this page, or select √ and press Ctrl+C (Cmd+C on Mac). It is plain Unicode text, so it pastes into documents, chats, code, and design tools.
What is the Unicode code point for Square root?
Square root is U+221A (decimal 8730, hexadecimal 0x221A, octal 0o21032). It lives in the Mathematical Operators block (U+2200–U+22FF) of the Basic Multilingual Plane (BMP, Plane 0).
What is the official Unicode name of Square root?
The Unicode Standard (version 18.0.0) names this character "SQUARE ROOT". Its General_Category is Sm (Symbol, math).
What is the HTML code for Square root?
Use √ or √, or the named entity √. In CSS, use content: "\221A".
How do I type Square root in code?
JavaScript: "\u221A". Python: "\u221A". JSON and Java: "\u221A". The UTF-8 byte sequence is E2 88 9A.
Is Square root an emoji?
No. Square root is a text symbol and renders as a monochrome glyph in the current font. Some platforms may offer an emoji variant when U+FE0F is appended.