π pi
π
U+03C0
Copy as
| Character | π | |
|---|---|---|
| Unicode | U+03C0 | |
| HTML decimal | π | |
| HTML hexadecimal | π | |
| HTML named entity | π | |
| CSS content | \03C0 | |
| JavaScript / UTF-16 | \u03C0 | |
| UTF-8 bytes | CF 80 |
Meaning & usage
Pi (π) belongs to mathematical notation rather than ordinary punctuation.
Use it in formulas, comparisons or technical explanations, and define its role when the context is ambiguous.
U+03C0 identifies this exact pi form; copying the character preserves its Unicode identity, while its appearance depends on the font or emoji renderer.
Lowercase pi π often represents the ratio of a circle's circumference to its diameter. It may also serve as a variable in other contexts, whereas uppercase Π is commonly used for a product of terms.
How to type pi
- Windows
- Use Win + . for the emoji and symbol panel, or Character Map for supported fonts. In Microsoft Word, enter each hexadecimal code (3C0) and press Alt + X. There is no universal decimal Alt code for this character; legacy Alt codes depend on the code page.
- Mac
- Open Character Viewer with Control + Command + Space and search for pi. With the Unicode Hex Input keyboard enabled, hold Option and enter the UTF-16 units shown above. Standard Option shortcuts do not cover every Unicode symbol.
- Linux
- In compatible GTK applications, press Ctrl + Shift + U, enter 3C0, then Enter. Enter each code point separately for sequences. Other desktops or apps may require their character picker.
- iPhone & Android
- Look for pi in your emoji keyboard if available, or copy it here and paste. Save frequently used symbols as a text replacement or keyboard shortcut; availability varies by keyboard.