Pi

Meaning and uses

The Greek letter pi. In maths it is the ratio of a circle's circumference to its diameter, about 3.14159, which is why March 14 is celebrated as Pi Day.

Unicode details

π is the Unicode character named GREEK SMALL LETTER PI, code point U+03C0, in the Greek and Coptic block. It was added in Unicode 1.1 in 1993, and Unicode classes it as a lowercase letter (general category Ll).

It is not an emoji, so it keeps the colour and size of the text around it.

Tap a code to copy it:

How to type π

• On any device, tap the copy button above, then paste with a long press on a phone, Ctrl+V on Windows or Cmd+V on a Mac.
• In Microsoft Word on Windows, type 03C0 and then press Alt+X to turn the code into π.
• On a Mac, press Control+Cmd+Space to open the Character Viewer, then search for “greek small letter pi”.
• On Linux, most desktops accept Ctrl+Shift+U, then 03c0, then Space or Enter.
• In HTML, use π or π. In a CSS content property, use "\03C0".