SYMBOL
√ square root
Unicode information
square rootSQUARE ROOTU+221A√√\221a\u221AMath17.0Meaning of √ square root
The √ radical symbol is commonly used to represent the square root of a number or expression.
Common uses
- Square roots.
- Algebra and geometry.
- Scientific formulas.
How to type √ on Windows, Mac and mobile
Windows
The universal method is to use Copy on this page and paste √. On Windows 10/11 you can press Win + . and browse the Symbols section, or open Character Map (charmap) to locate characters supported by your fonts.
Mac
Press Control + Command + Space to open Character Viewer, search for square root, then double-click it to insert the character.
Microsoft Word
Type 221A without U+, then immediately press Alt + X. Word converts the code into √. You can also use Insert → Symbol.
Google Docs
Open Insert → Special characters and search by name, or paste √ directly. For emoji, you can also use your operating system emoji picker.
iPhone / iPad
iOS does not provide a direct Unicode-code entry method for every symbol. Copy √ from SymbolDex or check long-press variants on related keys. For frequent use, create a shortcut under Settings → General → Keyboard → Text Replacement.
Android
Availability varies by Android keyboard. In Gboard, browse the symbols panel and long-press related keys for variants. If it is not available, copy √ from SymbolDex and paste it where needed.
Linux
In many Linux apps using GTK/IBus, press Ctrl + Shift + U, type 221a, then confirm with Enter or Space. If your app does not support this method, copy and paste √.
Web and programming codes
Copy the representation you need for HTML, CSS, JavaScript or Python. For emoji sequences, SymbolDex includes every code point in the correct order.
√√\221a\u221A\u221A√Usage examples
√9 = 3√x√(a² + b²)