# Pi Symbol in Greek Alphabet

**Pi** (uppercase Π, lowercase π) is the sixteenth letter of the Greek alphabet and it has a value of 80 in the Greek numeral system. The letter is pronounced as "p". It came from the Phoenician letter pē, which meant mouth. The Phoenician letter also gave rise to the Latin P and Cyrillic П. The capital *letter pi* is used in mathematics and chemistry. The lowercase letter pi (π) has been used as a symbol for mathematical constant since the mid-18th century. This symbol is also called Archimedes' constant or Ludolph's number. You can see the lowercase letter pi is used in microeconomics and macroeconomics too.

In math, **the greek symbol pi (π)** is approximately 3.14159265. The lowercase letter pi is used to represent the homotopy group and prime-counting function in mathematics. In particle physics, pi is used to denote pion or pi meson. There are many uses of the lowercase letter pi such as economic profit in microeconomics, the inflation rate in macroeconomics, the prime-counting function in math, etc. In science and engineering, the uppercase pi (Π) is used to indicate the viscous stress tensor and the osmotic pressure. The capital letter pi also appears in computer science and logic.

## Greek Capital Letter Pi Symbol

Pi symbol decimal

Pi symbol hex

Pi symbol named entity

## Greek Small Letter Pi Symbol

Pi symbol decimal

Pi symbol hex

Pi symbol named entity

### Pi Symbol Entity Codes Table

Pi Symbol Name | Symbol | Decimal | Hex Entity | Html Entity |
---|---|---|---|---|

Greek Capital Letter Pi | Π | Π | Π | Π |

Greek Small Letter Pi | π | π | π | π |

##### Copy and Paste Pi Symbol

Π

π

You are on the **Pi letter symbol** page of the Greek Alphabet letters.