The square root symbol (√) is commonly used in mathematics, science, and engineering. Whether you’re solving equations or writing technical documents, knowing how to type the square root symbol quickly using Alt codes and shortcuts can be very helpful.
In this guide, you’ll learn how to insert the √ symbol on Windows, Mac, and Linux, along with Unicode and character map alternatives.
Square Root Alt Code for Windows
On Windows, you can type the √ symbol using an Alt code. Follow these steps:
- Enable Num Lock on your keyboard.
- Hold down the Alt key.
- Type 251 on the numeric keypad.
- Release Alt, and the √ symbol appears.
Windows Square Root Alt Codes
| Symbol | Alt Code |
|---|---|
| √ (Square Root) | Alt + 251 |
| ∛ (Cube Root) | Alt + 8731 |
| ∜ (Fourth Root) | Alt + 8732 |
📌 Tip: If your keyboard doesn’t have a numeric keypad, use the Character Map (Win + R → Type charmap → Enter).
How to Type the Square Root Symbol (√) on Mac
Mac users can insert the √ symbol using Option key shortcuts or the Character Viewer.
Mac Shortcut for the Square Root Symbol
| Symbol | Mac Shortcut |
|---|---|
| √ (Square Root) | Option + V |
✅ Bonus Tip: Open the Character Viewer using Cmd + Control + Space, search for “Square Root,” and insert it.
How to Type the Square Root Symbol (√) on Linux (Ubuntu)
Linux users can insert the √ symbol using Unicode input or the Compose Key.
Method 1: Unicode Input
- Press Ctrl + Shift + U.
- Type 221A (Unicode for √).
- Press Enter, and the √ symbol appears.
Method 2: Using the Compose Key
- Enable the Compose Key in your settings.
- Press Compose, then type V + `.
- The √ symbol will appear.
Using the Square Root Symbol in Documents & Browsers
The √ symbol is commonly used in:
✅ Microsoft Word, Excel, PowerPoint
✅ Google Docs, Sheets, Slides
✅ LibreOffice Writer, Calc, Impress
✅ Web Browsers (Chrome, Edge, Firefox, Opera, Safari, Brave, DuckDuckGo, Ecosia)
✅ Mathematical equations and scientific writing
✏ Example Use in a Sentence:
- “The square root of 16 is √16 = 4.”
FAQs About the Square Root Alt Code
What is the square root Alt code on Windows?
The Alt code for √ is Alt + 251.
Can I use the square root symbol in Word?
Yes! Use Alt + 251 or go to Insert → Symbol → √.
How do I type the square root symbol on a laptop without a number pad?
Use the Character Map (Windows) or Character Viewer (Mac) to insert √.
Complete List of Windows Keyboard Shortcuts
If you need help for Windows, you can find a whole list of all keyboard shortcuts here.
https://keyboard-shortcuts.org/
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