π
π Pi Symbol
Pi (π) is the mathematical constant ≈ 3.14159, the ratio of a circle's circumference to its diameter.
Also known as: pi symbol, greek small letter pi, 3.14 symbol.
Codes
| Symbol | π | |
| Unicode | U+03C0 | |
| HTML entity (named) | π | |
| HTML entity (decimal) | π | |
| HTML entity (hex) | π | |
| CSS | \03C0 | |
| LaTeX | \pi | |
| Windows Alt code | Alt + 227 |
How to type π (Pi Symbol)
WindowsAlt + 227
Hold Alt and type 227 on the numeric keypad, then release Alt (Alt + 960 also works in apps with Unicode input).
Mac⌥ + P
Press Option + p.
Microsoft Word03C0, Alt + X
Type 03C0, then press Alt + X to convert it to π.
Google Docs
Insert → Special characters, then search “pi” or “greek small letter pi”.
LaTeX\pi
Use \pi in math mode.
Usage
- π ≈ 3.14159 is the ratio of a circle's circumference to its diameter.
- The area of a circle is A = πr², and its circumference is C = 2πr.
- π appears throughout trigonometry, geometry and calculus (radians use π).