√
Square Root
Square Root • U+221A
Click to Copy Symbol
Symbol Description
The square root symbol indicates the number that, when multiplied by itself, gives the original number.
Primary Uses:
- •Mathematical calculations
- •Quadratic equations
- •Geometry problems
- •Physics formulas
Technical Information
Unicode
U+221A
HTML Entity
√
HTML Code
√
CSS Code
\221A
Hex Code
√
Usage Examples
√16 = 4
√(x² + y²)
Distance = √((x₂-x₁)² + (y₂-y₁)²)
Input Method Guide
Windows Input Methods
1Alt Code
- 1
Make sure Num Lock is enabled
- 2
Hold down the left Alt key
- 3
Type 8730 on the numeric keypad
💡 Use Alt+8730. If Alt code fails, type 221A then press Alt+X in Word, or use Copy & Paste.
- 4
Release Alt key, square root (√) will appear
2Unicode (Alt+X)
- 1
Type 221A in the document
- 2
Press Alt + X to convert to the symbol
💡 Alt+X works in Microsoft Word and many Office apps. It is not supported in Notepad and some third-party editors.
3Word Method
- 1
Type 221A then press Alt+X in Microsoft Word
- 2
Alternatively, use Insert > Symbol if Alt+X is unavailable